We are looking to migrate from exchange 2007 on premise to O365 exchange online. We need to add a 3rd party ssl cert so that we can start the migration. When the ssl is installed and assigned the roles we find that windows phones stop email syncing, we have found that removing the email account and re-adding has worked but due to the large number of users this is not something that is not an option.
Has anyone else had this issue and how have they got around it?
any help would be appreicated.