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Microsoft 365 EWS Retirement: What IT Teams Should Do Before April 2027

Microsoft’s retirement of Exchange Web Services (EWS) is no longer a distant roadmap item. Enforcement has started rolling out across Microsoft 365 tenants, and the service is scheduled to be switched off permanently on 1 April 2027. For organisations using CloudM Migrate for Microsoft 365 projects, that makes migration readiness a task to put on the calendar now.

CloudM’s support update of 30 October 2026 explains that some Microsoft 365 workloads in CloudM Migrate still use EWS. The company is moving those connectors to Microsoft Graph, but that work is not generally available yet. In the meantime, customers need to make sure the CloudM application is permitted to use EWS in each affected tenant.

What is changing with EWS?

Microsoft is moving Exchange Online integrations away from EWS and towards Microsoft Graph. The change is being enforced progressively rather than on one single date for every tenant. From October 2026, Microsoft began setting EWS to disabled in tenants where it had not been explicitly configured. It also introduced an application allow-list model, so simply setting EWS to enabled is no longer enough once enforcement reaches a tenant.

From 1 April 2027, EWS will be fully disabled in Exchange Online. No tenant setting or allow-list entry will keep it working after that date. If a migration project depends on an EWS-based workload, the team needs a tested plan well before the cut-off.

Which CloudM Migrate workloads could be affected?

CloudM says the change affects Microsoft 365 migrations involving mail, calendars, contacts, tasks and notes where the current connector uses EWS. The impact depends on the workloads in scope, the tenant’s EWS configuration and whether the CloudM application registration is already on the relevant allow list.

There is one important detail for IT teams: Microsoft may have created an allow list based on applications that used EWS in the previous 60 days. Apps that are used infrequently, or were created more recently, may not be included automatically. A migration that worked during an earlier test is not proof that every production tenant is ready.

What should Singapore IT teams do now?

  • Inventory active migration projects. Identify every Microsoft 365 tenant and workload that relies on CloudM Migrate, including mail, calendar, contact, task and note data.
  • Check the tenant’s EWS settings. Confirm whether Microsoft’s enforcement has reached the tenant and whether an application allow list is in place. Do not rely on the legacy EWS-enabled setting alone.
  • Allow-list the CloudM application. Follow CloudM’s current guidance to add its Migrate app registration to Microsoft’s EWS allow list for the affected tenant. Have the Microsoft 365 administrator verify the application ID and policy change.
  • Allow time for the change to take effect. CloudM advises allowing up to 24 hours after updating the allow list before testing the migration again.
  • Run a representative test. Validate each workload, check data counts and permissions, and confirm that the migration can complete within the planned change window.
  • Keep the Graph transition on the roadmap. Ask your migration partner to confirm when Microsoft Graph support for the required workloads becomes generally available and what version or configuration will be needed.

Plan migration windows around the deadline

For Singapore organisations, the risk is not just a failed connector. A migration can affect staff access, project deadlines and business operations, especially when email and collaboration data are being moved between tenants. Build the EWS check into the project plan, schedule a test before the production cutover, and make sure the Microsoft 365 owner and migration partner agree on who is responsible for the allow-list change.

It is also worth checking how the migration handles data governance. Confirm where migration data is processed, who can access it, how temporary copies are protected and how exceptions are recorded. These questions matter for organisations handling personal data, confidential customer information or regulated business records under Singapore’s PDPA and internal security policies.

Do not leave the check until the final cut-off

CloudM’s guidance gives customers an interim way to keep affected migrations running while its Microsoft Graph work progresses. That is useful, but it should not become a reason to postpone planning. Tenant-by-tenant enforcement has already begun, and the April 2027 retirement date is fixed.

If your organisation is planning a Microsoft 365 migration, ask your IT team or CloudM partner to review the EWS dependency now. A short compatibility check, allow-list review and controlled test can help prevent a last-minute disruption when the migration window matters most.

About CloudM
CloudM is an award-winning SaaS company whose humble beginnings in Manchester have grown into a global business in just a few short years.

Our team of tech-driven innovators have designed a SaaS data management platform for you to get the most from your digital workspace. Whether it’s Microsoft 365, Google Workspace or other SaaS applications, CloudM drives your business through a simple, easy-to-use interface, helping you to work smarter, not harder.

By automating time-consuming tasks like IT admin, onboarding & offboarding, archiving and migrations, the CloudM platform takes care of the day-to-day, allowing you to focus on the big picture.

With over 35,000 customers including the likes of Spotify, Netflix and Uber, our all-in-one platform is putting office life on auto-pilot, saving you time, stress and money.

About Version 2 Limited
Version 2 Digital is one of the most dynamic IT companies in Asia. The company distributes a wide range of IT products across various areas including cyber security, cloud, data protection, end points, infrastructures, system monitoring, storage, networking, business productivity and communication products.

Through an extensive network of channels, point of sales, resellers, and partnership companies, Version 2 offers quality products and services which are highly acclaimed in the market. Its customers cover a wide spectrum which include Global 1000 enterprises, regional listed companies, different vertical industries, public utilities, Government, a vast number of successful SMEs, and consumers in various Asian cities.

SealPath’s 2026 Data Protection Report: Why Teams Need Persistent Document Control

Most organisations have got better at controlling who can open a file inside their own systems. The harder question is what happens after that file is shared with a supplier, customer, external adviser or an AI tool. SealPath’s 2026 State of Data Protection report highlights a gap between access policies and the ability to keep control of information once it leaves the organisation.

The report is based on a survey of 1,052 security and technology professionals, with fieldwork carried out in July and August 2026. Its findings are useful for Singapore businesses reviewing data protection, secure collaboration and the controls they need as employees make wider use of generative AI.

Access control is only part of the job

According to the report, 85% of respondents say they apply least-privilege access. However, only 36% can change a document’s permissions after it has been sent, and just 21% say they have persistent protection in place. That difference matters because a file can move beyond the original repository very quickly: it may be downloaded, forwarded, copied into a project workspace or shared with an external party.

Revoking access to a folder or user account does not always solve the problem if a copy of the document is already outside the organisation’s control. Security teams need to consider the file itself, not just the location where it was first stored.

AI use adds another route for sensitive information to travel

The report found that 48% of participants confirmed that sensitive information had been entered into AI tools, while another 20% suspected this had happened. Although 78% said their organisation had an AI usage policy, only 26% reported technical measures to block sensitive information from being uploaded to those tools.

This is a practical challenge, not simply a policy issue. Staff may paste contract clauses into an assistant to prepare a summary, upload engineering drawings for analysis or use internal reports to draft a presentation. The intention may be harmless, but the organisation still needs to know what information is being shared and whether the destination is approved.

Why persistent document protection is worth evaluating

SealPath’s information rights management approach applies protection to the document, rather than relying only on the repository around it. Its platform combines encryption with usage permissions and traceability, helping organisations control who can access a protected file and what they are allowed to do with it. Depending on the configuration, administrators can also track access and revoke permissions after a document has been shared.

That model can be useful for contracts, financial records, customer information, product designs and other documents that regularly move between internal teams and external partners. SealPath describes SaaS and on-premises deployment options, alongside integrations with common business applications and storage environments.

What the findings mean for Singapore buyers

Singapore organisations should assess these controls against the way information actually moves through the business. The report found that 72% of respondents share sensitive information with third parties at least occasionally, but only 46% said they could revoke access to shared information and 32% could audit third-party access. Those gaps are relevant to businesses working with regional suppliers, outsourced service providers, legal advisers and overseas subsidiaries.

The report also found that 83% of respondents consider data sovereignty important or mandatory, and 72% apply that consideration to AI tools that process sensitive information. For local buyers, this is a reminder to ask where data is stored and processed, which administrators can access it, how keys and permissions are managed, and what happens when a document crosses a national boundary.

These questions should sit alongside the organisation’s obligations under Singapore’s PDPA and its own contractual and industry requirements. A technology platform can support governance, but it does not replace the need for clear policies, staff training, supplier due diligence and legal review.

A practical checklist before choosing a solution

  • Identify high-value information. Start with documents that would create material risk if they were copied or shared without approval.
  • Protect the file after sharing. Check whether permissions remain enforceable when a document is downloaded or sent outside the original repository.
  • Test revocation and audit. Confirm that administrators can withdraw access and review who opened a document, including external users.
  • Check application fit. Validate support for the file types and tools your teams already use, especially Office documents, PDFs and engineering or CAD files where relevant.
  • Review deployment and data flows. Compare SaaS and on-premises options, hosting locations, integrations, identity controls and administrator access.
  • Pilot real workflows. Test with a small group that regularly shares sensitive files with customers or partners, and measure both security outcomes and user friction.

Move from policy statements to controls that travel with the data

The main lesson from the 2026 report is that a policy can say who should access information, but it cannot by itself protect every copy once a document starts moving. Singapore IT and security teams should review whether their current controls can follow sensitive information through collaboration, external sharing and approved AI use.

Persistent document protection is one option to assess as part of that wider programme. The right starting point is a focused pilot using the documents and sharing scenarios that matter most to the business, with clear success measures for usability, access control, auditability and data governance.

About SealPath
SealPath is the European leader in Data-Centric Security and Enterprise Digital Rights Management, working with significant companies in more than 25 countries. SealPath has been helping organizations from different business verticals such as Manufacturing, Oil and Gas, Retail, Finance, Health, and Public Administration, to protect their data for over a decade. SealPath’s client portfolio includes organizations within the Fortune 500 and Eurostoxx 50 indices. SealPath facilitates the prevention of costly mistakes, reducing the risk of data leakage, ensuring the security of confidential information, and protecting data assets.

About Version 2 Limited
Version 2 Digital is one of the most dynamic IT companies in Asia. The company distributes a wide range of IT products across various areas including cyber security, cloud, data protection, end points, infrastructures, system monitoring, storage, networking, business productivity and communication products.

Through an extensive network of channels, point of sales, resellers, and partnership companies, Version 2 offers quality products and services which are highly acclaimed in the market. Its customers cover a wide spectrum which include Global 1000 enterprises, regional listed companies, different vertical industries, public utilities, Government, a vast number of successful SMEs, and consumers in various Asian cities.