


Windows 7: Click Start, type regedit.exe in the search box, and then press Enter.Windows 10, Windows 8.1, and Windows 8: Press Windows Key + R to open a Run dialog box.Open Registry Editor by using one of the following procedures, as appropriate for your version of Windows: This registry data is intended for testing purposes only. To resolve this problem, change the value of MapiHttpDisabled to 0 (zero) or delete the MapiHttpDisabled DWORD value. This problem can occur if the MapiHttp feature is disabled on the Outlook client using the following registry value: Key: HKEY_CURRENT_USER\Software\Microsoft\Exchange MAPI/HTTP connections are designated in the Protocol column using the string HTTP.Īdditionally, if MAPI/HTTP is disabled, Microsoft 365 users receive a Basic Authentication prompt instead of a Modern Authentication prompt.
