Skype support is was providing this notice :.

Existing Skype accounts that were previously migrated from Messenger are were seeing the dialog box (below) when using their Microsoft Account credentials to sign-on to Skype.

if one can’t sign on with a Messenger (Microsoft Account credentials) username/password to either Messenger or Skype then any attempt to use either would be fruitless.

Until this problem is resolved it might be prudent to delay upgrading Messenger to Skype (i.e.If you’re familiar with the the term ‘hunting for snipe’ the parallel being drawn in the title of the article is that both are/were (during the outage) apparently impossible tasks.The ability to continue to use Messenger is not a viable alternative since Messenger will prompt with a message stating that ‘A newer version is available’ – The ‘Newer’ version **is** Skype.It is not known (at the time this article was written) whether the upgrade process is the cause of the Skype/Microsoft Account Sign-in failure nor when the problem will be resolved.Microsoft is currently upgrading (mandatory) Live Messenger accounts to Skype.As of the evening of Apthe ability to sign on to Skype with a Microsoft Account has been failing.“UPDATE 13:50 GMT]: We are still monitoring the situation but the majority of users should now be able to sign into Skype with their Microsoft Account.” EST, 7:50 a.m PST) Skype is reporting the problem has been resolved for the majority of users.

Users are were experiencing problems (failure) signing on to Skype using a Microsoft Account username/password.

Skype sign in fields