Troubleshooting Microsoft 365 Email Set-up
Learn how to troubleshoot common issues and set up Microsoft 365 email seamlessly for optimal productivity and communication.
Written by Cheri Klussendorf
Updated at May 12th, 2025
Table of Contents
If you do not see it, ensure you are logged into the right Azure tenant, and have gone through the 365 EmailHub onboarding steps.
Enterprise application is enabled and accessible to users
Select the enterprise application from the previous steps
Go to “Manage” > “Properties”
Ensure “Enabled for users to sign-in?” is set to “Yes”
Based on the value of “Assignment required? “
If set to “No” then you can continue to the next troubleshooting step
If set to “Yes” then go to “Users and Groups” for the enterprise application, and check the intended users or groups with the email addresses or exchange inboxes have been added
Diagnose permissions errors
Select the enterprise application from the previous steps
Go to “Security” > “Permissions” and under “Admin consent” you should see the following:
If you do not see this, then click the “Grant admin consent” button which is visible above the “Admin consent” tab in the enterprise app
Next, go to “Activity” > “Sign-in logs” > the “Service principal sign-ins” tab > and choose a date filter of 7 days
If you did any 365 EmailHub actions recently, wait one hour for them to appear in the sign-in activity. When a permissions error occurs, you should see it listed here and can click to inspect it. For example, it may show a conditional access rule that is blocking the enterprise app, which you can then use to add an exclusion to the rule.
Diagnose Exchange problems
After reviewing the steps above, try logging into the intended email user or a user with access to the mail group (depending on your setup).
Ensure that the email (either a user or group folder) has a proper “Inbox” folder. Without an “Inbox” folder, ExpertConnect has no folder to read for inbound email.
Go to the user, shared inbox, or group in Microsoft 365 Admin Center (https://admin.microsoft.com)
Ensure the entity has a valid 365 Exchange license or equivalent assigned
Ensure the entity’s settings allow inbound emails from outside the organization, the entity is not blocked from using their email, etc.