

If you're running Office 2013, make sure that both Outlook and MSO are updated to the Decemupdates, or a later update release, before you use this registry key. In the Value data box, type 1, and then click OK. Right-click AlwaysUseMSOAuthForAutoDiscover, and then click Modify. Type AlwaysUseMSOAuthForAutoDiscover, and then press Enter. On the Edit menu, point to New, and then click DWORD Value. In Registry Editor, locate and click the following registry subkey: HKEY_CURRENT_USER\Software\Microsoft\Exchange Windows 7: Click Start, type regedit.exe in the search box, and then press Enter.Ive changed the setting back, but that doesnt seem to resolve the problem. The only thing that has changed since yesterday is that I changed conditional access in Azure to include Office 365 cloud application.

Windows 10, Windows 8.1, and Windows 8: Press Windows Key + R to open a Run dialog box. I have several users where since today Outlook keeps asking for credentials, but is not accepting them.Start Registry Editor by using one of the following procedures, as appropriate for your version of Windows: We recommend that users force Outlook to use Modern Authentication. Before you modify it, back up the registry for restoration in case problems occur.Ĭreate the following registry key to force Outlook to use a newer authentication method for web services, such as EWS and Autodiscover. Serious problems might occur if you modify the registry incorrectly. Follow the steps in this section carefully.
