Although the issue is associated with Azure Conditional Access Policies, other factors such as corrupted cache files or an outdated Windows system could also prompt this error.
1. Contact Your Organization’s IT Administrator
Should your account be managed by an organization, begin by reaching out to the IT administrator to have your credentials validated. This step is crucial as incorrect login information could be the reason why you are experiencing error code 53003.
2. Reset or Repair the Microsoft 365 App
Resetting Microsoft 365 will eliminate application-specific data such as cookies, settings, cache, and images. In contrast, the repair function will address potentially corrupted files within the application. It is advisable to attempt to repair the Microsoft 365 app initially; if the issue continues, proceed with resetting the app.
3. Clear Browser Cache
For those using Outlook via a web browser and encountering this error, clearing the browser’s cache could potentially resolve the problem.
4. Reinstall the Microsoft 365 App
After trying the aforementioned solutions without success, consider reinstalling the Microsoft 365 app to determine whether corruption within the application files is the source of the problem.
