Scenario
You'd like to find out more about how the Exclaimer Outlook Add-In connects to the internet to download signatures. You have a restrictive firewall policy and need to whitelist the URLs used by the Add-In.
Resolution
The Exclaimer Outlook Add-In uses the following URLs - please add these to your firewall allow/exceptions list to ensure that the Exclaimer Outlook Add-In can connect successfully:
| URL | Purpose |
|---|---|
| login.microsoftonline.com | Used to authenticate to Azure. |
| secure.aadcdn.microsoftonline-p.com | Used to authenticate to Azure. |
| cloudgeolocationcdn.azureedge.net | Used to determine which datacenter to connect to. |
|
<region code>.outlooksignatures.exclaimer.net (Where <region code> is replaced with the region code for the subscription, see: How to check your region code) |
Used to download signature data. |
|
https://appsforoffice.microsoft.com/lib/1.1/hosted/office.js |
Runtime support. |
|
https://static2.sharepointonline.com/files/fabric/office-ui-fabric-core/9.6.1/css/fabric.min.css |
CSS for the display of the add-in user interface. |
|
https://pro.fontawesome.com/releases/v5.10.0/css/all.css |
CSS for the display of the add-in user interface. |
Region code
AU Australia
CA Canada
DE Germany
EU Europe
UAE UAE
UK United Kingdom
US United States