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Metadata at Oct 10, 2024

Message ID

MC834102

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Last Updated

Oct 10, 2024

Published Jul 24, 2024

Service

Microsoft 365 apps

Tag

Updated message
Feature update
User impact
Admin impact
View the latest version See what changed since this version

MC834102 - External recipients MailTip offline behavior update for Microsoft Outlook for iOS and Android

Message Center

What changed since this version

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Updated October 10,November 15, 2024: After further review we have decided not to proceed with this change at this time. We have updated the rollout timeline below. Thank youapologize for your patience.any inconvenience. 

This feature update expands how Microsoft Outlook for iOS and Android gives external recipient warnings when the client cannot reach the MailTip service.warnings.

When this will happen:

General Availability (Worldwide, GCC, GCC High, DOD): We will begin rolling out mid-August 2024 and expectcommunicate via Message center when we are ready to complete by late November 2024 (previously late September).proceed.

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 whenAndroid. If set, this list of domains will be used to make determinations for external recipient warnings rather than 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 domain configuration.

You may want to notify your users about this change and update any relevant documentation as appropriate. 

Snapshot from Oct 10, 2024

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.