Incorrect Outlook settings can also be one of the reasons behind Outlook synchronization errors. After the files get repaired, restart the Outlook program to ensure that the Outlook syncing issues are resolved or not. 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 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. You run the Microsoft consent process using an eligible M365 account after which you will be taken to the sync's setup wizard. You can close the wizard at this point as you do not need to complete it for re-authentication to take effec

21Vianet also expect customer to collaborate at reasonable level accordingly. 21Vianet assigns a severity level to a case when it's opened, based on an assessment of the issue type and customer impact. Examples of issue types and severity levels are shown in the following table. Authorized administrators can use the Microsoft 365 operated by 21Vianet portal to submit service requests online and access support telephone numbers. We can help you find a solution or connect you to technical support.


Refer to your email service provider’s official documentation for the correct SMTP settings if you’re unsure. Temporarily disabling antivirus and firewall tools helps determine whether they’re interfering with Outlook’s communication. If the server is down, you’ll need to wait until Microsoft or your email provider resolves the issu


With directory synchronization, you can continue to manage users and groups on-premises and synchronize additions, deletions, and changes to the cloud. But setup is a little complicated and it can sometimes be difficult to identify the source of problems. We have resources to help you identify potential issues and fix the


You might find someone who faced a similar issue and solved it using a different approach that works better in your situation. Knowing the reasons behind the Outlook sync issues will help us to fix this problem and prevent issues in communication and workflow. There can be several reasons for the Outlook synchronization error. Before we know the solutions, we will understand a few common causes of the how to fix Outlook not opening today Outlook sync problem. The Users Loaded count will be 0 if all users fail to meet the system's requirements for user records. The Users Processed count will be 0 is there are no users in the synced dataset after filterin


If the OST still gets corrupted when you have reduced the size there is something in the mailbox causing the problem. You must re-select "Account Settings" when it opens across a drop-down menu. There, lead into the "Data Files" tab and select your OST file. After selecting the file, click on "Open File Location" to redirect to the folder. Click the "Data Files" tab on the window and select your respective OST file. Click the "Open File Location" button to lead to the folder automaticall

The Microsoft 365 Copilot app brings together your favorite how to fix Outlook not opening today apps and Copilot in one intuitive platform. The Microsoft 365 Copilot app empowers your employees to do their best work with Copilot in the apps they use daily. Microsoft 365 with Microsoft Teams helps deliver a complete, secure solution to help everyone work better, smarter, and more cohesively. Microsoft Create has professionally designed, fully customizable templates to help you get things done.

Check out all of our small business content on Small business help & learning. For more information about the availability of support throughout the life of your product, visit the Microsoft Lifecycle Policy. See the table below for the type of support you can get depending on your product.

Self-service support is available for all Microsoft 365 operated by 21Vianet users, and includes troubleshooting tools and videos, help articles and videos, as well as forums and wikis in the Microsoft 365 community. For more self-help resources, see Microsoft 365 operated by 21Vianet. You must be an admin for a business subscription to use these support methods. Explore learning tools to collaborate on projects together and independently, all in one place. Create equitable learning environments that help students develop knowledge with familiar apps essential to both academic and future career success.


TrustedTech is dedicated to being a reliable resource for all software and technology support needs. Our relationship to the Microsoft Partner Network allows us to provide competitive pricing and authentic software and support, all with a much-needed human element. Discover how IT leaders can address key Microsoft Copilot questions on cost, deployment, security, and integration how to fix Outlook not opening today to maximize ROI and adoption. 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 pricin