Trying to active Microsoft Office for Mac 2016 a Macbook Pro. After entering valid Office 365 Business Premium user account login details following error message is displayed:
Another account from the same organization is already signed in
All steps need to be completed on a Mac computer.
If Apple Mail didn't automatically assign a correct folder on the IMAP server as its Sent folder, this can be easily fixed.
Simply select the correct folder in the folders pane on the left-hand side. Then from the menu select Mailbox > Use This Mailbox As > Sent Mailbox.
Mac OS X has an annoying habit of littering network shares with .DS_Store (Desktop Services Store) files. If you only use Mac OS X and other Unix based systems you may never actually see them, but in mixed environments they can become a bit of a nuisance. There is nothing critical stored in .DS_Store files, just Finder specific settings, such as icons size and location, view settings, etc.
To prevent .DS_Store from being created on network shares, run following command in terminal.
defaults write com.apple.desktopservices DSDontWriteNetworkStores true
To revert changes and resume .DS_Store file creation run:
defaults write com.apple.desktopservices DSDontWriteNetworkStores false
