Details:
MS: “Upgrades to how your email signatures are managed will be launching soon. These enhancements change where the signature data is stored from per-device to per-account. This means the same set of signatures will be available on any Windows (Microsoft 365) or Web version of Outlook, and you will no longer need to reconfigure your signatures when getting a new device.

Clients with this enhancement will migrate the local signatures to the cloud automatically, no manual steps are required.”

For the admins:
MS: “If you use a 3rd party signature management solution, you will likely not be affected by this change for now as we have provided a mechanism to maintain the existing behaviour while we work with these partners to align on our cloud signature storage. If you have questions about this, please contact your signature solution vendor.”

Availability:
Due by late October 2022 (already available in Beta and Preview channels for some time).
Now due by late April 2023. Microsoft: “To ensure the best possible experience for our users, we made the decision to make additional changes prior to completing deployment.”

Source, related links, and references:
MC450845.
Read more: Outlook roaming signatures (microsoft.com).

Check status:
Microsoft 365 Roadmap ID 60371.

Page originally published:
30th October 2022 and kept up to date.