2026-08-19
🔗 Signatures for Send As Permissions
Deploy Outlook signatures for Send As and Send on Behalf scenarios, including shared mailboxes, distribution lists and delegated identities.
When users send email using Send As or Send on Behalf permissions, the mailbox they send from is often not a primary Outlook mailbox. This matters because Outlook only fully supports signatures for primary mailboxes, and Set-OutlookSignatures follows the same mailbox model when determining where signatures can be managed.
By...
2026-08-12
🔗 How to Prevent Outlook Signature Changes
Limit Outlook signature editing and enforce the correct signature across all Outlook clients at send time.
Outlook does not provide one administrative control that prevents users from changing email signatures across Classic Outlook, New Outlook, Outlook on the web, Outlook for Mac, and Outlook mobile. Even where signature settings can be restricted, users can usually modify or remove an inserted signature while composing a message.
This...
2026-07-29
🔗 Delegate Out-of-Office Management with Exchange RBAC
Delegate mailbox automatic-reply management through scoped Exchange RBAC roles without granting broad administrative access.
Managing automatic replies for department mailboxes should not require broad Exchange administrator rights. Exchange RBAC can delegate this specific mailbox-options task to selected users while limiting their access to mailboxes within a defined department scope.
This is useful when a shared mailbox needs a temporary response, a mailbox owner is...
2026-07-22
🔗 Cross-Tenant Outlook Signatures
Deploy Outlook signatures across Microsoft 365 tenants using mailbox targeting and GraphClientID mappings.
Outlook signature deployment across multiple Microsoft 365 tenants becomes difficult when the signature must follow the sending mailbox, not the user’s home tenant. The defining constraint is that the visible sender identity may belong to a different tenant, while the email still needs the correct company details, branding, and legal...
2026-07-20
🔗 Set-OutlookSignatures v4.31.0: Better Global Add-in Support
v4.31.0 improves localisation, task pane usability, deployment checks, and custom Outlook signature handling.
Set-OutlookSignatures v4.31.0 strengthens the Outlook add-in for multinational Microsoft 365 environments by improving localisation, task pane usability, deployment validation, and custom signature handling. The release is especially relevant for organisations where Outlook is used across different languages, regions, sender addresses, and signature decision paths.
The most visible change is localisation...