It is recommended to full Directory Sync all Active Directory users and leave this flag as the default False.Īfter you enable AutodiscoverPartialDirSync, it will take approximately 3 hours to fully saturate across the cloud.įor instructions using PowerShell see this topic, Connect to Exchange Online PowerShell. Online email addresses will be susceptible to enumeration. Setting this flag to true will cause unknown users to be redirected to the on-premises endpoint and will allow on-premises users to discover their mailbox automatically. The AutodiscoverPartialDirSync option is for scenarios where tenants have Directory Synced some of their Active Directory users into the cloud, but still have on-premises Exchange users that are not Directory Synced.
4 - When done, go to Control Panel -> Programs.
2 - Scroll down until you find 1 - Open Windows -> Settings -> Apps -> Apps & Features.
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This parameter is available only in the cloud-based service. If this is a new PC then you will have a trial of the MS Office 'Store' apps installed which you need to uninstall as per the following. Use the PowerShell AutodiscoverPartialDirSync option when your tenant has Directory Synced some of your Active Directory users into the cloud, but you still have on-premises Exchange users that are not Directory Synced. Learn more at Azure AD Connect User Sign-on options.Ģ. Sync all your mailboxes to Office 365 as mail users so they are known hybrid users and get redirected back to on premises.įor more information see these reference materials:Įxchange hybrid deployment considerations which links out to this more specifically on AzureAD connect for syncing: Azure AD Connect sync: Understand and customize synchronizationĪctive Directory Synchronization is also listed as a pre-requisite for Exchange Hybrid: Hybrid deployment prerequisitesĪctive Directory synchronization: Deploy the Azure Active Directory Connect tool to enable Active Directory synchronization with your on-premises organization. This issue occurs if the Office 365 tenant has at least one mailbox in the cloud.īelow are the two main options to resolve the issue:ġ. In the pop-up Change Account window, make sure that the Remember password option is checked. Highlight your account and click on Change. On premise customers with the Office 365 client began seeing unexpected credential prompts in Outlook for Windows starting on or after November 11th. In the Account Settings section, select Account Settings.
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