Hi @Adnan Javed
Teams tag is mainly focused on the general issue of Microsoft Teams troubleshooting. According to your description, your question is not in our support scope. The following suggestion is for your reference:
- Check update settings: Make sure your update channel and policy are configured correctly. You can configure the update channel through Group Policy, Intune, and PowerShell, refer to this.
- Clear cache: Please try to clear the existing Microsoft Defender update cache before checking for updates.
- Turn off update checking for Microsoft Defender.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.