The very first Autodiscover step is to check the registry for some special “boot” information that tells Outlook that you are in the middle of one of these restart scenarios and to read the Autodiscover payload from the special local file. In some cases, such as when you add a second account while Outlook is running, the Autodiscover payload is cached to a local file to be used during a restart of the Outlook client. Many of these steps can be controlled by using Group Policy Objects (GPO), and the GPO value is included in the step description. Specifically, in the Office 365 specific steps that are listed in Autodiscover process ( step 4 and step 11), policy control is available to ensure that appropriate service endpoints are used during the Autodiscover process.Īutodiscover process Every time that Outlook needs Autodiscover information, it uses a set of ordered steps to try to retrieve an XML payload that contains configuration settings. In the context of the Autodiscover feature in Outlook, this feature set includes policy settings and behavior that ensures the service endpoints used for Autodiscover adhere to sovereign cloud requirements. Microsoft Office 365 provides features that can support customers with ITARobligations. To avoid this scenario, the user can log on by using a UPN instead of domain\username. After Outlook discovers the UPN for the user, the value is cached in the profile, and the lookup should not happen again for this user. In complex environments, this may cause a large number of DCs to be contacted before a result is found. Outlook will request that this lookup should chase referrals. In order to get the UPN, Outlook must first look the user up in the directory. But if a user use domain\username to log in Windows, Outlook only has the same credential for the user. The UPN may have been used to logon to Windows, in which case Outlook has direct access to the UPN from the logon credentials. On a domain-joined computer, Outlook needs to know the UPN for a user in order to initiate the Autodiscover process. Use User Principal Name (UPN) to expedite the Autodiscover process. For more information about MAPI, see the following MSDN article: Outlook MAPI Reference. When another application invokes it by using MAPI. In various scenarios, when a connection attempt fails, Outlook starts an Autodiscover task to retrieve new settings in any attempt to correct the connection problem. In response to certain connectivity failures. Each attempt can potentially be staggered by as much as 25 percent because of the background task infrastructure used by all Microsoft Office applications. If the attempt isn't successful, the next try is made 5 minutes later. If this process is successful, another try is made one hour later. Office 365 client update channel releases More information Autodiscover timingĪutodiscover runs at the following times:Īt set intervals to collect changes to URLs that provide Exchange Web Service features (OOF, Availability Service, and so on). Version and build numbers of update channel releases for Office 365 clients For more information about the Office 365 client channel releases, see the following Microsoft websites: This article describes the implementation of Autodiscover in the current channel Click-to-Run release of Outlook 2016. In Outlook 2016 with Exchange servers, Autodiscover is considered the single point of truth for configuration information and must be configured and working correctly for Outlook to be fully functional. The top of the About Outlook box shows the version number and 32-bit or 64-bit distinction.Autodiscover is the feature that Outlook uses to obtain configuration information for servers to which it connects. If you need to know whether you're using the 32-bit version or the 64-bit version of Outlook, select About Outlook. For example, yours may list Microsoft 365 Apps for enterprise, and you can see which apps it contains by their icons. You'll find your version and build number under Product Information. You'll see the product version on the right side of the page. If you don't see Office Account, option, choose Help. The version information will be on the right.Ĭheck which version of classic Outlook you have Check which version of new Outlook you haveĬhoose Genera l, then About Outlook. If you do see File on the menu, follow the steps in the classic Outlook section. If you don't see File on the menu in Outlook, follow the steps in the new Outlook section. Steps to determine your Outlook version are different between the new and classic Outlook for Windows.
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