How to Troubleshoot Common Microsoft 365 Problems and Issues

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Troubleshoot Office 365 Sync and Login Issues

Boost your SMB’s security and compliance with Microsoft 365 Business Premium. Discover Defender and Purview add-ons for enterprise-grade protection at SMB-friendly pricing. TrustedTech is a Microsoft CSP Direct Bill Partner with all six Solutions Partner designations and decades of expertise in licensing, support, and cloud infrastructure. If you're looking for smarter ways to manage, secure, or optimize your Microsoft 365 (M365) environment, our U.S.-based team is here to help. Microsoft offers several built-in tools to help identify and resolve persistent issues. You will need to have the correct privileges set on your Azure account in order to set up the M365 sync.

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  • The simplest way to resolve authentication issues is to rerun the authentication process by clicking the Sign in with Microsoft on the Microsoft 365 settings page.
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  • The system requires that users have a first name, last name and a valid email address that conforms with your domain lock if enabled.
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  • You can do this in the Microsoft 365 Sync Wizard on the configuration page of your platform settings.
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  • You run the Microsoft consent process using an eligible M365 account after which you will be taken to the sync's setup wizard.
  • To resolve these issues you should run the steps in this article and check whether the groups in your sync's filtering preference contain users in Azure AD.


The Users Processed count will be 0 is there are no users in the credential loop in Microsoft 365 synced dataset after filtering. If you don't wish an inactive user to be made active by the M365 sync, you can add the user's email address to the sync forbid list. You can do this in the Microsoft 365 Sync Wizard on the configuration page of your platform settings. You'll also receive a mail (to the alternate email and to your admin email) from Microsoft 365 that indicates your tenant has encountered directory synchronization errors.

I got an error message that my company has exceeded the number of objects that can be synchronized



Our licensing engineers can help triage complex problems and ensure you're on the right support path. The error message in the Summary sheet of the Sync Summary spreadsheet attachment can also highlight the reason for this. Both of our authentication methods can fail if the Enterprise Applications entry for the sync in Azure AD is deleted or Outlook Not Sending or Receiving Email if it has had its permissions modified. You can stop any accounts from being brought over by adding them to the sync deny list. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.

Troubleshoot Office 365 Sync and Login Issues

What should I do if my sync failed due to authentication issues?



Troubleshoot Office 365 Sync and Login Issues

After you run the commands, and if they completed without errors, you may see a quick progress indicator or modern authentication troubleshooting a status result that contains information about the package installation. This issue occurs only on computers that are running Windows 10, version 1703 or later, and Microsoft 365 version 1807 or later. We are a paid-for question and answer site and not affiliated with any other company. I will be assisting you today and hope we can solve the issue together.

Tools & Methods To Use to Troubleshoot Office 365 Issues



Troubleshoot Office 365 Sync and Login Issues

The sync will fail if the total number of all users (active or inactive) on your account exceeds the user limit placed upon it if present. The Summary sheet on the spreadsheet attachment of your sync summary includes an Updated User Count and User Limit. These figures will give you an impression of how far over the limit the account is. Sync failure alerts do not always include a full summary or attachment, you can run a test sync to obtain this data.
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