Setting up BrandMail Web for Microsoft 365 consists of the following steps:
Step 1: Log into your Microsoft 365 Admin Center
Step 2: Access Integrated Apps
Once you have logged into Office Portal go to the Integrated apps.
Step 3: Edit BrandMail Web
Locate BrandMail Web in the Integrated apps list. Double click BrandMail Web to edit the add-in.
Step 4: Update add-in
Click the Update add-in hyperlink.
Step 5: Provide link to manifest file.
Please click "Provide link to manifest file" and paste the manifest file from the Admin Console for BrandMail Web into the textbox.
Step 6: Validate the manifest file
Click Validate button. Once the manifest has been validated, click Next.
Please click the Accept and update button. The application will then go through the deployment process.