diff --git a/website/docs/support/known_issues.md b/website/docs/support/known_issues.md
index e809fc565..af2bc2db9 100644
--- a/website/docs/support/known_issues.md
+++ b/website/docs/support/known_issues.md
@@ -5,6 +5,9 @@ Below is a list of known Corso issues and limitations:
 * Only supports Exchange (email, calendars, contact) and OneDrive (files) M365 data. Additional
   data types and services will be added in subsequent releases.
 
+* Backups of Exchange email may not include changes to the read status of an email if no other changes
+  to the email have been made since the previous backup.
+
 * Restores are non-destructive to a dedicated restore folder in the original Exchange mailbox or OneDrive account.
   Advanced restore options such as in-place restore, or restore to a specific folder or to a different account aren't
   yet supported.