O365 Shared Calendars not working in Outlook

[ninjafish]

Hi All,

 

I am having some trouble with shared calendars.

 

I have an account with about 10 calendars which need to be shared with different team members (all part of the same O365 tennancy). When I share the calendars the user gets the invite and accept, the calendar works in the web interface but not in Outlook. in Outlook you get an error stating that either the server can not be contacted or that the folder is unavailable.

 

• I have shared the calendar from both webmail and Outlook desktop application with the same resulds.
  
• Every so often it works for a user in Outlook but i am not sure why/how.
  
• I have made sure that the account is visable in the address book (I have read previously that this can be the cause to the issue)
  
• I spoke to Microsoft when i originally had this issue and they didnt have an answer. They spent hours trying to fix it but didnt manage (this is when i found sharing the default cal helped)
  

 

My previouse work around for this was to share the default calendar first and then once this had worked share the other calendars, this worked more times than not but i dont really want to have to share the default calendar.

 

Has anybody else had the same issues or got any advise/surgestions?

 

Many thanks all!

[MrFrostmaul]

We have been having an issue same as yours and also a calendar that a staff member created where everyone can see apart from themselves...

Seems they have broken something and not making it public or just don't have an idea..

[Firefox]

What version of Outlook and what OS are you running on?

 

We had something similar when our mailbox was in the cloud, running on Windows 10 and Outlook 2016. The problem for us was an IE issue with the proxy.pac file.

 

IE 11 has deprecated the use of a proxy.pac file://C:\Windows\proxy.pac location, instead replacing this with HTTP or HTTPS

 

https://blogs.msdn.microsoft.com/ieinternals/2013/10/11/understanding-web-proxy-configuration/

 

There is a reg "workaround" on Windows 7 to allow the deprecated feature to still function, but this doesn't work for Windows 10.

 

The symptoms were experienced as a result were much like yours, and were resolved when changing th file to being hosted on a HTTP site

Edited June 13, 2016 by Firefox

[ninjafish]

We use Windows 7 64-bit, and they have the latest version of ie I think so this sounds like it may be the cause of the issue. We use the proxy.pac to force the clients to talk to the proxy (smoothwall). When you say your problem was resolved by hosting the file on a http site is this the. Pac file or the calendar?

 

Many thanks!

[ninjafish]

I have read the article in full now and see what you mean about the pac files. Our client pcs get the pac from smoothwall and I am sure this is via http, I will have to check.