introduce Desk type

[kundan-bharti]

Submitted via Learn Editor.

[learn-build-service-prod]

Learn Build status updates of commit b1842f6:

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[learn-build-service-prod]

Learn Build status updates of commit cc500a1:

✅ Validation status: passed

File	Status	Preview URL	Details
exchange/exchange-ps/exchange/Set-Mailbox.md	✅Succeeded	View (exchange-ps)

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[learn-build-service-prod]

Learn Build status updates of commit 54e0638:

✅ Validation status: passed

File	Status	Preview URL	Details
exchange/exchange-ps/exchange/Set-Mailbox.md	✅Succeeded	View (exchange-ps)

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[learn-build-service-prod]

Learn Build status updates of commit 103dc07:

✅ Validation status: passed

File	Status	Preview URL	Details
exchange/exchange-ps/exchange/Set-Mailbox.md	✅Succeeded	View (exchange-ps)

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