You can see the synchronization status here and your new .ost file now. As it is the replication of the existing information of Exchange Server mailbox, so the complete process Outlook data file cannot be accessed does not cause any damage to the information. See your Exchange Server administrator for this information or permission


If these methods do not resolve the issue, we recommend that you rebuild the .ost file. To do this, delete the .ost file, and then let Outlook download the information again from Exchange Server. For more information, see the More information section of this article. Users can also convert OST files into various file formats, including PST, HTML, EML, MSG, vCard, et


If it continues to be problematic, you may need to either a.) Remove any related credentials from the users credential manager in Control Panel, it b.) Create a new outlook profile. Modern authentication (ADAL) with AD FS requires the /adfs/services/trust/13/windowstransport endpoint to be enabled. A vast community of Microsoft Office365 users that are working together to support the product and others. Since Microsoft recently demanded OAuth2 authentication, I've been trying everything I found Outlook data file cannot be accessed here and at Microsoft, but every 'help' webpage to setup Hotmail and Thunderbird seem badly outdated. We recommend using Outlook on the web to check your email or consider configuring a supported email client. If the error you are encountering is not listed, please create a ticket on our Email and Calendar Help page for assistanc


It also provides the option to export the Outlook OST file into Office 365 and Live Exchange mailboxes. This software also has a splitter option to split large-sized PST files into smaller ones, helping users prevent oversized PST file issues. Incorrect Outlook settings can also be one of the reasons behind Outlook synchronization errors. So, Outlook data file cannot be accessed follow the below steps to reset Microsoft Outlook settings. After the files get repaired, restart the Outlook program to ensure that the Outlook syncing issues are resolved or no


In certain AD FS configurations, the administrator may not have forms-based authentication enabled on the AD FS server. This prevents Windows clients that are running Outlook data file cannot be accessed Office from logging in as required by the authentication process. But primarily I am guessing you are changing the server name. This does not enable any oauth list entry that may be available for that serve


Login to server outlook.office365.com with username [Duck ID]@uoregon.edu failed. Additionally, accessing email through a web client will continue to work, even if an application is having issues. This page contains information on what errors may come up when setting up your email with Modern Authentication (Modern Auth), and what steps are needed to resolve them. I’m going to try & switch modern authentication off to see if that is the issue, although there doesn’t seem to be any way of doing this. I’m quite fortunate that this is just my O365 instance, so customers not being impacted. Desktop SSO is the process that's used to obtain seamless sign-in to Microsoft 365 resources through AD FS from a domain-joined computer that's inside a company networ


If memory serves me right, modern auth with 2fa, and being a GA and using the account for outlook are known for issues. So, it looks like the version of Outlook that I have won’t play nice with Modern Authentication. I have confirmed that on two different PCs that are accessing the same mailbox with the same version of Outlook, which is the latest version from Microsoft included within my Office 365 packag


However, with the right tools and techniques, it can be resolved. This blog specified four different manual ways to repair Outlook data files. Therefore, using a professional tool is an effective solution. The best solution to avoid manual challenges and complete this task effectively is the Outlook data file cannot be accessed Shoviv Outlook PST Repair Tool. It offers various facilities to the users, allowing them to complete the process smoothly and confidently. In addition, this software has a straightforward GUI, so every user will be able to fix PST files without hassl

When desktop SSO fails, users may be unable to activate Microsoft 365 Apps for enterprise or users may be prompted for forms-based logon even though they are using domain joined-computers from inside the company networ


Follow these steps to repair your Outlook personal folder file (.pst) by using Inbox Repair tool. If you can open the original Outlook Data File, you might be able to recover additional items. The Inbox Repair tool creates a backup file with the same name as the original, but with a .bak extension, and saves it in the same folder. There may be items in the backup file that you might be able to recover that the Inbox Repair tool couldn't. Problems like system crashes, sudden shutdowns, or profile issues can corrupt the OST file, causing Outlook to display sync errors or lose access to your data. Although Outlook lets you recreate the file, doing so may result in the loss of any unsynced change