Hi,
should the new mail client in OSX 10.11 be able to support multiple exchange accounts at once? I have to use 4 all of which are held within the office 365 environment and having more than 1 active causes mail to crash on startup with a 'Root folder ID changed ... once an account is created, the root folder id shouldn't change on the server' error.
Disabling the accounts within Internet Accounts allows me to open mail, and adding them back one at a time allows me to have 2 active but restarting then goes bang again.
Deleting and re-adding them doesn't work as the Internet Accounts tool doesn't do anything once 'Done' is clicked after keying the details back in, so no chance of getting the system to recreate with an apparently correct folder ID.
If I try to deactivate the only active exchange account, I then get a message that 'Only one Exchange account can be enabled at a time' which I guess answers the question about multiple accounts.
Is this going to be enforced going forwards that only the one account can be active, or is this just a beta limitation? If this is a design choice then there will be a lot of people who need to access corporate mail accounts, or who use office 365 who will have to stop using the Apple Mail client.
Any suggestions apart from using Outlook?
many thanks,
Scott...