The following document details the supported environments for Signature 365 and available features for both Outlook client-side components, based on Mailbox location.
Outlook Classic:
| Signature 365 Add-in | Signature 365 Agent | |
|---|---|---|
| Exchange Online mailbox | All Add-in features supported | All Agent features supported |
| Exchange On-Premise mailbox | Add-in supports preview-only | All Agent features supported |
Outlook "New"
| Signature 365 Add-in | Signature 365 Agent | |
|---|---|---|
| Exchange Online mailbox | All Add-in features supported | Unsupported by application |
| Exchange On-Premise mailbox | Add-in supports preview-only | Unsupported by application |
Outlook Web Access:
| Signature 365 Add-in | Signature 365 Agent | |
|---|---|---|
| Exchange Online mailbox | All Add-in features supported | Unsupported by application |
| Exchange On-Premise mailbox | Add-in supports preview-only | Unsupported by application |
Outlook Mac:
| Signature 365 Add-in | Signature 365 Agent | |
|---|---|---|
| Exchange Online mailbox | All Add-in features supported | All Mac Agent features supported |
| Exchange On-Premise mailbox | Add-in supports preview-only | All Mac Agent features supported |
Outlook Mobile:
| Signature 365 Add-in | Signature 365 Agent | |
|---|---|---|
| Exchange Online mailbox | Add-in supports default signature insertion only. Task pane unavailable | Unsupported by application |
| Exchange On-Premise mailbox | Unsupported by application | Unsupported by application |