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Daylight Saving Time & Time Zone Blog
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Interim guidance for Manitoba permanent DST 2026

Naveen_Shankar's avatar
Naveen_Shankar
Icon for Microsoft rankMicrosoft
Oct 07, 2026

Microsoft has made a decision about addressing the new time-related change for Manitoba

Editor's note October 13, 2026: Microsoft has released an update to address the new time-related change for Manitoba. Please refer to Manitoba 2026 time zone update available now On September 17, 2...
Updated Oct 27, 2026
Version 5.0
PeteSchmuland's avatar
PeteSchmuland
Copper Contributor
Oct 08, 2026

Hey James,

Once the new zone has been implemented in Exchange Online something like:  

Get-Mailbox -ResultSize Unlimited -RecipientTypeDetails UserMailbox | Set-MailboxRegionalConfiguration -TimeZone "Manitoba Standard Time"

Should be sufficient.

JamesEpp's avatar
JamesEpp
Iron Contributor
Oct 08, 2026

Hiya, Pete. :)

Yeah I don't doubt that will be the case and the Set-MailboxRegionalConfiguration cmdlet (plus the other cmdlet for working hour timezones) is what I'm looking to use.

My (implied) question for Microsoft is more when this is going to happen, as it's not necessarily the case that all tenants get the update at the same time.

See you on the 20th.