Cannot Log into Outlook on Mac Error? How to Fix It

Summary: The authentication architecture for Outlook on macOS is notably more prone to complex failures than its Windows equivalent. When the macOS passwords connect with the company’s security rules and Microsoft’s Modern Authentication (MSAL), the error, “Cannot log into Outlook,” occurs. Continue to read this article to know everything about this error: why it occurs and how one can fix it. The solutions mentioned below are designed for company-managed Macs and professional Microsoft 365 business accounts.

Decoding the Errors: Outlook for Mac Log in Issues

AADSTS50076	MFA required to sign in
AADSTS53003	Login blocked by security policy
AADSTS70011	Permission Error: Access Denied
AADSTS65001	App permissions not granted
“Can’t verify…” / Blank Auth	Saved login data is corrupted
“Password is incorrect”	Your saved login info is out of date
Repeated sign-in loop	Outlook is stuck in a continuous sign-in loop
Profile won’t load	Network connection blocked by the firewall

Multiple Fixes to Resolve “Cannot Log into Outlook” on Mac

Let us now look at the different manual fixes that resolve the Outlook for Mac login errors. We will also learn about a professional tool that helps users backup their OLM file data before executing the fixes.

Fix 01: Re-add the Existing Outlook Account

By removing and re-adding the Outlook account, the user can establish a fresh connection with the mail server. The Outlook login error can occur if the saved authentication data gets corrupted.

To re-add the account, follow these steps:

1. On your Mac, open MS Outlook and click on Outlook.
2. Then, choose Settings > Accounts and select the desired email account.
3. After that, remove the selected account and restart the application.
4. Now, again go to Settings > Accounts > + Add Email Account.
5. Enter the new email ID and click Continue.
6. Next, input the password and finish the setup process.

Fix 02: Verify Your Email Login Details

Incorrect login credentials are the most common reasons behind the “Outlook cannot log in” error. Make sure to enter the correct email ID, password, and other details. Also, if there is two-factor authentication, make sure to generate an app password.

Fix 03: Restart the macOS Device

Sometimes, the Outlook Login issue on Mac occurs due to a temporary glitch, background authentication issues, or network issues. Restarting the system refreshes the operating system.

1. Close all the Microsoft apps and then click on the Apple menu.
2. After that, select the Restart button and wait for the system to shut down.
3. Then, restart the system and open Microsoft Outlook again.
4. Now, try to log in to your Outlook email account.

Fix 04: Remove Saved Outlook Passwords from Keychain Access

If the data is corrupted in the authentication details, Outlook may show a login error. It is recommended to delete the saved passwords and create fresh login credentials.

1. First, close MS Outlook and then open Finder.
2. Now, go to Applications > Utilities and launch Keychain Access.
3. After that, head to the Default Keychains section and select Login.
4. Next, search Outlook, Microsoft, Office … and look for credentials, email details, or passwords.
5. Right-click on each of them and select Delete. Close the Keychain Access.
6. Restart the system and open Outlook again. Check by entering the account login details.

Fix 05: Upgrade Outlook for Mac to its Latest Version

Working on an older version of MS Outlook may contain bugs or compatibility issues. Upgrading to the newer versions of macOS resolves the compatibility issues and fixes the login problems.

1. On your macOS, open the Outlook application.
2. After that, navigate to Help > Check for Updates.
3. If an update is available, it will be displayed as Microsoft AutoUpdate.
4. Click on Update and install the latest update.
5. Now, restart your Mac and open the Microsoft Outlook application again.
6. Try to sign in to your email account.

The user can try out these fixes to solve the “Cannot log into Outlook” error. Moreover, it is recommended to always take a backup of the Outlook for Mac OLM files. To backup the Mac Outlook OLM file data in bulk, use an expert software, the MacSonik OLM Converter. This converter tool enables users to import OLM file to Office 365 and other email platforms. Also, it supports conversion to PST, MBOX, EML, PDF, and various file formats as well. 

Simple steps to backup the Mac Outlook OLM data:

1. Download and run the tool on your system.
2. Then, choose between Single Mode or Multiple Mode to add your desired OLM file and press Next.
3. Select the Output File Format as desired and apply the additional settings if needed to refine the process.
4. Now, click on the Destination Path to choose the location to save the file.
5. At last, tap the Convert button to backup the OLM file.

Conclusion

To wrap up, through this blog, we have shared all the relevant approaches that solve the “Cannot log into Outlook” error. This error can occur due to several reasons, including incorrect authentication and an outdated Mac version of the OS. We have mentioned multiple manual solutions that can fix this problem. Furthermore, it is suggested that users should keep a backup of their Outlook for Mac OLM file. For this, an expert tool is Mac OLM Converter, which automates the process in just a few clicks.

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