Scenario
OWA signatures are not updating in Microsoft 365 even though deployment is successful and there are no errors reported.
Information
Microsoft enabled the roaming signatures feature on all Microsoft 365 tenants in April 2023.
Even if later disabled by the customer, Microsoft is known to re-enable roaming signatures at a later date.
Email Signature Manager is unable to update OWA signatures when roaming signatures are enabled.
Recommendation
Symprex recommends upgrading to Signature 365, which is designed for Microsoft 365. Signature 365 supports Outlook on all platforms, including mobile, and also New Outlook.
Special pricing is available for existing Email Signature Manager customers, and Email Signature Manager settings can be easily migrated directly to Signature 365.
It is recommended to upgrade to Signature 365 before September 2026, when Microsoft will disable the Exchange Web Services (EWS) API in Exchange Online.
Solution
Please note: Version 10.1 or later of Email Signature Manager is required for OWA signatures to work with Exchange Online.
Microsoft has provided the following PowerShell command to disable roaming signatures on a Microsoft 365 tenant:
Set-OrganizationConfig -PostponeRoamingSignaturesUntilLater $true
To confirm roaming signatures have been disabled:
- Log on to OWA.
- Open Settings, select Account and select Signatures.
- If your Signatures page appears as the image below, the roaming signatures feature has been enabled on your Microsoft 365 tenant:
- If your Signatures page appears as the image below, roaming signatures are disabled:
Applies to
Email Signature Manager, v9, v10