Hello, 

Using Azure AD, we can be logined by using multiple account on the same browser at the same time like below.

I was configured IdP eSpace for the tenant of one of them.

When my web app which is running on the browser with multiple Azure AD logined redirected to the URL returned by IdP_SingleLogout_URL action, the following error occurred. 

Request Id: 8ecba7cb-a2da-4ddc-a6ec-c001d18f9100
Correlation Id: cfd42cee-071a-4db7-ac91-82ec917af295
Timestamp: 2020-12-16T05:34:41Z
Message: AADSTS750015: Wrong SAML message type 'LogoutResponse', expected 'Request'.

Could you help me to avoid this error?

(When I using single account at once, my web app can log out without errors. I want to know for the multiple logined case.)

Sincerely,
Moriya Takasi