Why Did I Receive an Email Showing a Different Version After My Work 365 Upgrade?

Overview

If you received an email showing a different version after a Work 365 upgrade, that usually does not mean the upgrade failed. Work 365’s published release notes show that a single release can carry separate Backend and CRM version numbers, and Work 365 has also documented cases where the CRM solution version changed slightly during production rollout without any substantive product change.

Because of that, the most reasonable explanation is that the email referenced a broader release-level or backend version, while your environment showed the installed CRM solution version that was actually imported into Dataverse. That is an inference based on Work 365’s published version-history examples and Microsoft’s Dataverse solution versioning model; Work 365’s public documentation does not explicitly state which exact version label is used in upgrade emails.

Why the Version in the Email Can Differ

Work 365’s release notes do not always use a single version label for everything. Some entries show both a backend version and a CRM solution version in the same release, which means the version visible in the environment may not match the broader release identifier someone saw in an email or release communication.

Microsoft’s Dataverse solution versioning also supports this behavior. Microsoft states that a solution version follows the format major.minor.build.revision, and managed solution updates are imported as versioned solution packages into the target environment. That means the version you see inside the environment reflects the installed managed solution package version, which can differ from a broader release label used elsewhere.

What to Check

If you want to confirm that the upgrade completed correctly, check the following in Work 365:

• Go to Administration → Admin Hub → Solution Management

• Confirm Upgrade Tenant completed successfully

• Wait the required 1 hour after the core upgrade for Dynamics table migration

• Run Initialization from the same page after that wait

• If the page shows Upgrade Portal, confirm whether the portal solution also needed a separate upgrade

If those steps were completed successfully, a version mismatch by itself is not strong evidence of a failed upgrade.

Troubleshooting

The email version and installed version do not match

Do not treat that mismatch alone as proof of a failed upgrade. First compare the relevant Work 365 release notes (Updates and Changes ) and check whether the release includes separate Backend and CRM versions, or whether the CRM solution version was revised during production rollout, as in the documented 4.5.0.36 → 4.5.0.37 example.

The environment still behaves incorrectly after the upgrade

The next thing to verify is whether the documented post-upgrade process was fully completed, especially the 1-hour wait and the Initialization step. Work 365’s upgrade instructions present both as required parts of the process after running Upgrade Tenant.

A portal issue appeared after the core upgrade

Check whether Upgrade Portal was available and needed to be run separately. Work 365 documents the portal upgrade as a distinct step that appears only when a newer portal solution is available.