diff --git a/app/src/main/java/eu/faircode/email/FragmentOAuth.java b/app/src/main/java/eu/faircode/email/FragmentOAuth.java
index f991a8e13a..c2860f13f3 100644
--- a/app/src/main/java/eu/faircode/email/FragmentOAuth.java
+++ b/app/src/main/java/eu/faircode/email/FragmentOAuth.java
@@ -224,6 +224,13 @@ public class FragmentOAuth extends FragmentBase {
                     throw new IllegalArgumentException(getString(R.string.title_no_email));
                 if (!Helper.EMAIL_ADDRESS.matcher(email).matches())
                     throw new IllegalArgumentException(getString(R.string.title_email_invalid, email));
+
+                String e = email.toLowerCase();
+                if (e.contains("@outlook") ||
+                        e.contains("@live") ||
+                        e.contains("@hotmail") ||
+                        e.contains("@msn"))
+                    throw new IllegalArgumentException(getString(R.string.title_setup_office_remark));
             }
 
             etName.setEnabled(false);
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 8c3b0db03d..4c4440e1dd 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -177,6 +177,7 @@
     <string name="title_setup_gmail_rationale">Please grant permissions to select an account and read your name</string>
     <string name="title_setup_gmail_permissions">Google will ask for permissions to read, compose, send and permanently delete all your email. FairEmail will never delete your messages without your explicit consent.</string>
     <string name="title_setup_gmail_drafts">If the drafts folder is not accessible by IMAP, this can be fixed in the Gmail label settings</string>
+    <string name="title_setup_office_remark">Microsoft does not provide this type of authorization for Outlook, Live, Hotmail, etc accounts</string>
     <string name="title_setup_office_auth">The error \'AUTHENTICATE failed\' can be caused by IMAP/SMTP being disabled by the system administrator</string>
     <string name="title_setup_oauth_rationale">Authorize access to your %1$s account</string>
     <string name="title_setup_oauth_authorize">Authorize</string>