To access a Service Account via the 'Open Another Mailbox' feature in Outlook on the web, the account you are logging in with must have full mailbox permissions to the Service Account.

1. Login to Outlook on the web with the account which has full mailbox permissions to the service account.
2. After logging in, select your profile picture in the top right, pictured below, to get the drop down menu and choose open another mailbox:  
   
   
   
   
3. This will give you a window to search for the account mailbox you are trying to open. Please type in the display name (or the email address) for the Service Account to find it in the GAL. Left click the account you wish to open

   Note: Because there will be many Service Accounts in the Microsoft 365 system, please type in the display name as accurately as possible to ensure you can easily find the correct Service Account.

   
   
   
4. After left-clicking the account, it should be selected and give you an option to open the account as pictured below. Please choose the open option.

   Note: if you experience an error at this step, please review our Microsoft 365 (Outlook on the web | Outlook for Windows | Mac) - Account Access Error document

   
   
   
5. A new window/tab for Outlook on the web should appear in your browser for the Service Account.

Important: If the Service Account was just created or updated by your administrator, it may take up to 60 minutes before you can access the account. If you receive the following error, please wait about an hour and try again.

This method can be used by individuals to access a Service Account's mailbox in the Outlook on the web client. This process requires that the NetID account you login to Microsoft 365 with is linked to the Service Account or you have been granted full mailbox permissions to it.

1. Use the steps outlined in the "Access mail folders in the same tab/window (works with Full Mailbox Permissions or permissions to access individual folders)" section.

Important: If the Service Account was just created or updated by your administrator, it may take up to 60 minutes before you can access the account.

• Outlook for Windows: the Service Account will automatically be mapped into your profile. Learn more.
• Outlook for Mac: the service Account will need to be manually configured/opened. Learn more.
• Outlook for iOS/Android device: the service account will need to be manually configured/opened. Learn more..

Once you have set a password for the Service Account:

1. Open a browser session that is not currently logged into the campus NetID login service.
2. Go to Outlook on the web login screen.
3. Enter the log in credentials for the Service Account: name_domain.
   

   

   E.g. Service Account: help@doit.wisc.edu - Service Account NetID: help_doit.

Note: If you do not know the Service Account credentials, contact your domain administrator.

By default, when a Service Account is created, it can only be accessed via the NetID@wisc.edu account that was linked to it. This is the recommended way to access a service account. However, if you want to configure the service account directly within a desktop/mobile client, then you need to set a password on the service account. Once the service account has a password, use the Microsoft 365 (Outlook for Android/iOS) - Configuring the Outlook app for Android/iOS documentation to configure it.