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GetCalendarView not using BST

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Posted on by PA-15051058-0

I have a flow that uses a HTTP request using a MSGraph URL GET command. It authenticates using Active Directory OAuth and outputs its data in JSON format. I am doing this to get the calendar events from various different room calendars.

https://graph.microsoft.com/v1.0/users/{RoomID}/calendarView?startDateTime={StartDateTime}&endDateTime={EndDateTime}

It works fine and provides a JSON output however it does not factor in BST and uses UTC. I have been looking into various ways to get it to use BST, one of which was using a header:

Prefer: outlook.timezone="Europe/London"

but it still does not work. I have also used MS Copilot to try and help with this but could not get it to work, I got it stuck in a loop and then it suggested creating a custom connector but my understanding is not good enough to make that work.

Can anyone help me to figure out why this happens, but more importantly, how to get around it? Or is this more of an MS graph question?

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Expiscornovus 33,195 Most Valuable Professional on at

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Hi @PA-15051058-0,

Just to double check. How did you configure the header. Did you set it up like the below?

{ "Prefer": "outlook.timezone=\"Europe/London\"" }

Happy to help out 😁

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PA-15051058-0 33 on at

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Hi @Expiscornovus

Yes this is what I did but it errored, I got the impression it may be a bug within Power Automate but I was unsure.

I have ended up doing a compare between current time (UTC) and current time (UK) to determine if it is BST or not.

Thanks for your reply though.

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Expiscornovus 33,195 Most Valuable Professional on at

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Hi,

Can you share the error message?

This will help troubleshooting your issue.

Happy to help out 😁

I share more #PowerAutomate and #SharePointOnline content on my Blog, LinkedIn, Bluesky profile or Youtube Channel

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