Link to join meeting (Teams)

Michal_Horniecky - You can shorten the URL if you're careful. Here's a URL generated by Outlook for a Teams Meeting (I've changed some of the ID characters for security reasons):

https://nam10.safelinks.protection.outlook.com/ap/t-59584e83/?url=https%3A%2F%2Fteams.microsoft.com%2Fl%2Fmeetup-join%2F19%253ameeting_ZGJlZDQ4ZTUtODJjNi00NDZiLTg4ZWItMzE2ZjQ2OGFlMmY3%2540thread.v2%2F0%3Fcontext%3D%257b%2522Tid%2522%253a%2522fe56fae7-055e-4c9g-b6d9-9a341506a999%2522%252c%2522Oid%2522%253a%2522a5464a0f-b535-456c-bfef-04c1c5fbbc23%2522%257d&data=04%7C01%7CAlan.McKenzie%40uk.xxx.com%7Ca54e541aabef4472988408d9b4c111f1%7Cce56fae6055d4c9fb6c99d341506a491%7C1%7C0%7C637739563593131543%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=cwpIaghts6DmHQYmmFliY06uP8o2NkCqOhBqof%2B%2F%2Buc%3D&reserved=0

Scary, right? Thing is, you don't really need all of that. I found that it wouldn't fit into a SharePoint List Link column ... too many characters. So I set about finding a way to shorten it. First thing, use an online decoder to get rid of the ASCII %  characters. So that it looks like this:

https://nam10.safelinks.protection.outlook.com/ap/t-59584e83/?url=https://teams.microsoft.com/l/meetup-join/19%3ameeting_ZGJlZDQ4ZTUtODJjNi00NDZiLTg4ZWItMzE2ZjQ2OGFlMmY3%40thread.v2/0?context=%7b%22Tid%22%3a%22fe56fae7-055e-4c9g-b6d9-9a341506a999%22%2c%22Oid%22%3a%22a5464a0f-b535-456c-bfef-04c1c5fbbc23%22%7d&data=04|01|Alan.McKenzie@uk.xxx.com|a54e541aabef4472988408d9b4c111f1|ce56fae6055d4c9fb6c99d341506a491|1|0|637739563593131543|Unknown|TWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0=|3000&sdata=cwpIaghts6DmHQYmmFliY06uP8o2NkCqOhBqof+/+uc=&reserved=0

There's still a bit of manual unencoding to do ... but first you can get rid of the last 3+ lines (red text). That leaves us with:

https://nam10.safelinks.protection.outlook.com/ap/t-59584e83/?url=https://teams.microsoft.com/l/meetup-join/19%3ameeting_ZGJlZDQ4ZTUtODJjNi00NDZiLTg4ZWItMzE2ZjQ2OGFlMmY3%40thread.v2/0?context=%7b%22Tid%22%3a%22fe56fae7-055e-4c9g-b6d9-9a341506a999%22%2c%22Oid%22%3a%22a5464a0f-b535-456c-bfef-04c1c5fbbc23%22%7d

We don't need that Outlook preface (in red), either. So now we have a much shorter URL that still needs a little manual unencoding:

https://teams.microsoft.com/l/meetup-join/19%3ameeting_ZGJlZDQ4ZTUtODJjNi00NDZiLTg4ZWItMzE2ZjQ2OGFlMmY3%40thread.v2/0?context=%7b%22Tid%22%3a%22fe56fae7-055e-4c9g-b6d9-9a341506a999%22%2c%22Oid%22%3a%22a5464a0f-b535-456c-bfef-04c1c5fbbc23%22%7d

You can find a guide to the ASCII codes at W3C. Once you've unencoded the remainder, you're left with:

https://teams.microsoft.com/l/meetup-join/19:meeting_ZGJlZDQ4ZTUtODJjNi00NDZiLTg4ZWItMzE2ZjQ2OGFlMmY3@thread.v2/0?context={"Tid":"fe56fae7-055e-4c9g-b6d9-9a341506a999","Oid":"a5464a0f-b535-456c-bfef-04c1c5fbbc23"}

So the format is:

Thread ID - teams.microsoft.com/l/meetup-join/19:meeting_ZGJlZDQ4ZTUtODJjNi00NDZiLTg4ZWItMzE2ZjQ2OGFlMmY3@thread.v2
Thread Message ID - 0 (has a value of zero because the URL was generated by Outlook, not Teams)
Tenant ID - fe56fae7-055e-4c9g-b6d9-9a341506a999
Organiser ID - a5464a0f-b535-456c-bfef-04c1c5fbbc23