Update Bookings tracker list when an appointment is updated 

That's unfortunate. Perhaps you could talk to your IT or InfoSec administrators and explain what you need to do, they can modify the DLP to accommodate it. If you can make a valid business case for the process - explain how what you want to do will improve efficiency, reduce costs, or both - you might convince them of its value to the organization.

Unfortunately, I don't. People in my organization don't use group bookings (or, at least, haven't yet). As I understand it, though, the first "booking" of a 1:N appointment would trigger a "When a booking appointment is created" flow. As additional people sign up for that booking, it's not a NEW booking, it just updates the first one. So, you need to account for that by having two flows. But, as I said, I have no practical experience in that area. You might want to post a message in the Power Automate Community (powerusers.microsoft.com/t5/Get-Help-with-Power-Automate/ct-p/FL_GeneralDiscussions). There are a lot of folks there and maybe someone has done what you're trying to do.

How are you trying to update the booking event? The Bookings connector doesn't have any actions that allow for editing an appointment, and the Outlook Calendar actions are going to need an entirely different identifier that (as far as I know) isn't included in the payload of the Bookings trigger output.

@@cvkealey I am trying to use the teams meeting link to filter and get my event from the calendar, then grab the icaluid from that event then flows to update the event itself. I’m not sure there’s a better way to do it… but I’m at a loss! also, not sure how to filter out the body of the event to filter query by the teams meeting link (to eq the ‘JoinURL’ in my sharepoint list, but that needs trimmed too) but I’m trying to play with it.

It's certainly ~possible~ to send this data to Excel. If it were simply for the purpose of having a "transaction log" of sorts, then that would be fine. However, editing data in Excel via Power Automate is more complicated than editing data in a SharePoint list. To work with the data at all, it needs to be in a table. Rows in an Excel table don't have a built-in, immutable "ID" to reference them. You can store a unique identifier in the row (just as I show in a list), but if people have edit permission to the Excel file, it's very easy to accidentally modify that data. Bottom-line: SharePoint Lists and Power Automate are very "made for each other". While you can use other data sources, they are not as convenient to work with. And don't get me wrong...Excel is great and can do lots of cool things. I use it all the time to "archive" data out of SharePoint lists, but practically never to ~manage~ data.

I have not tried that, and to be honest, it would be fairly complicated. The Bookings connector is fairly limited at this point. There are three triggers (when a booking is created, updated or cancelled) and only one action (list booking businesses where user is an admin). That means that there's no out-of-the-box way to programmatically modify those bookings appointments. So, sure, you could start an approval process when a booking is created, but regardless of the outcome of that approval, modifying the appointment is no going to be easy. I'm sure it IS possible using an HTTP call to Microsoft Graph, but that's outside my comfort zone.

@@cvkealey thank you :)

Can you elaborate on the problems? I mean, it's basically the same as if it's updated: you get the entry from the list based on the unique identifier, then do what you want to do with it.

@@cvkealey Yes so i copied the update and added the trigger is cancelled, but when i run it i get an error on "get item": The resolved string values for the following parameters are invalid, they may not be null or empty: 'id'.

@@ToekajaR If the previous flow worked as expected, then you need to check any actions where you referenced dynamic content from the trigger. When you deleted the previous trigger, any dynamic content you used from it was deleted, so you need to re-add those references.