[Outlook] (online meeting) Document workaround for Join button

[samantharamon]

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[learn-build-service-prod]

Learn Build status updates of commit e53452a:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/includes/outlook-contextual-add-ins-retirement.md	✅Succeeded	View
docs/outlook/online-meeting.md	✅Succeeded	View

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[learn-build-service-prod]

Learn Build status updates of commit dba9380:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/includes/outlook-contextual-add-ins-retirement.md	✅Succeeded	View
docs/outlook/online-meeting.md	✅Succeeded	View
docs/outlook/use-regular-expressions-to-show-an-outlook-add-in.md	✅Succeeded	View

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[learn-build-service-prod]

Learn Build status updates of commit d81a0b6:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/includes/outlook-contextual-add-ins-retirement.md	✅Succeeded	View
docs/outlook/online-meeting.md	✅Succeeded	View
docs/outlook/use-regular-expressions-to-show-an-outlook-add-in.md	✅Succeeded	View

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel