MC834102 Microsoft 365 Apps, Microsoft 365 Experts
From Microsoft Corporation, Published Oct 10, 2024
Summary
The update for Microsoft Outlook for iOS and Android expands external recipient warnings when offline by caching MailTip service results and allowing a new administrative setting for internal domains. Rollout begins mid-August 2024 and ends late November 2024. Organizations should manage external domain lists and inform users.
Details
Updated October 10, 2024: We have updated the rollout timeline below. Thank you for your patience.
This feature update expands how Microsoft Outlook for iOS and Android gives external recipient warnings when the client cannot reach the MailTip service.
When this will happen:
General Availability (Worldwide, GCC, GCC High, DOD): We will begin rolling out mid-August 2024 and expect to complete by late November 2024 (previously late September).
How this will affect your organization:
- When your organization has external recipient MailTip warnings enabled, results will be cached from the MailTip service in the users’ phones local databases, enabling Outlook to use these results to make determinations when it is unable to reach the MailTips service, such as when a user’s device is offline.
- A new optional administrative setting (InternalDomains) allows your organization to configure a list of internal domains to inform the external recipients warning in Outlook for iOS and Android when the MailTip service cannot be reached, such as when a user is offline.
- If the client is unable to reach the MailTip service, cached results are not available, and an internal domain list is not provided, Outlook will compare the domain of the sending account to the domain of each recipient.
This feature update is available by default.
What you need to do to prepare:
Manage the option to provide a list of external domains to provide external recipient MailTip warnings by Outlook for iOS and Android. For more information, see External recipients MailTip offline domain configuration.
You may want to notify your users about this change and update any relevant documentation as appropriate.
