Outlook Login Problems

Fix Outlook for Mac Cannot Add Outlook.com or Gmail Accounts

Muhammad Talha Oct 12, 2026 869 views

Question details

The user is unable to add Outlook.com, Gmail, or Google accounts to Outlook for Mac after installing or updating Microsoft 365.

Fix Outlook for Mac Cannot Add Outlook.com or Gmail Accounts

Product: Microsoft Outlook for Mac
Device & OS: macOS (MacBook Pro M1)
Scenario: Adding a new email account in Outlook for Mac after an application update or installation.
Observed behavior: Outlook fails to recognize or add the new accounts, making the software unusable for email and calendar management.

Before you start

Ensure your MacBook is connected to a stable internet network and verify that your Gmail or Outlook.com login credentials are correct before proceeding.

Solution 1Recommended

Clear the Outlook Cache and Update Software

Rebuilding the Outlook cache directory and updating the application can resolve account addition failures on Apple Silicon Macs.

Corrupted cache files from a recent Microsoft 365 installation or update can prevent Outlook from communicating properly with Gmail or Outlook.com servers.

Update macOS and Outlook

Ensure your MacBook Pro is running the latest version of macOS. Open Microsoft AutoUpdate to verify that Outlook for Mac is fully up to date.

Quit the Outlook Application

Close Outlook completely. Make sure it is not running in the background by checking the Dock or using Force Quit if necessary.

Access the Cache Folder

Open Finder, press Command+Shift+G on your keyboard to open the 'Go to Folder' window, and type ~/Library/Caches.

Delete Microsoft Outlook Cache

Locate the folder named 'com.microsoft.Outlook' and move it to the Trash. This forces Outlook to rebuild its cache upon the next launch.

Reopen and Add Account

Launch Outlook for Mac and attempt to add your Outlook.com or Gmail account again through the Preferences > Accounts menu.

Contact Microsoft Support: If you still cannot add the account after clearing the cache, contact Microsoft Support directly for product-specific assistance as this may be a known bug with the current build.

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Frequently Asked Questions

Why won't Outlook for Mac connect to my Gmail account?

This issue is often caused by an outdated application cache, incorrect IMAP/POP settings, or pending software updates. Clearing the Outlook cache folder on your Mac usually forces the application to re-sync and accept the connection.

Does clearing the Outlook cache delete my emails?

No, clearing the com.microsoft.Outlook cache folder only removes temporary configuration files. Your emails are safely stored on the email server (like Gmail or Outlook.com) and will re-sync once the account is successfully added.

What should I do if my M1 Mac still refuses to add the account?

If clearing the cache and updating macOS does not resolve the login problem, the issue might be a specific bug in your current Microsoft 365 build. You should contact Microsoft Support directly via their official contact page for live assistance.

Outlook & Email Problems