My account has disappeared in Thunderbird and I am unable to add it back again. My employer uses microsoft outlook accounts, and I have thus relied on the Owl ad-on for years to access this account. I appreciate that the problems that I am experiencing are likely due to Owl, but I would appreciate any insights anyone might have on the source of problems and how to overcome them. If I use automatic configuration then the search does not seem to bring up Owl as it should according to the manual (i.e., there is no exchange/office 365 option). I am also unable to add the account with manual configuration, and I get an "error is undefined" message. I have attached a screenshot I have contacted Owl support but have not received a response. Any help would be much appreciated. Kristian