diff --git a/CHANGELOG.md b/CHANGELOG.md
index 95d36e473..5274c39b7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Known Issues
 - Owner (Full control) or empty (Restricted View) roles cannot be restored for OneDrive
 
+### Known Issues
+- Event instance exceptions (ie: changes to a single event within a recurring series) are not backed up.
+
 ## [v0.5.0] (beta) - 2023-03-13
 
 ### Added
diff --git a/website/docs/support/known-issues.md b/website/docs/support/known-issues.md
index 3559e0704..dbf8086d1 100644
--- a/website/docs/support/known-issues.md
+++ b/website/docs/support/known-issues.md
@@ -21,3 +21,6 @@ Below is a list of known Corso issues and limitations:
   Future backups run when the data isn't modified will include the data.
   
 * OneDrive files ending in `.meta` or `.dirmeta` get omitted from Details and Restore commands.
+
+* Exchange Calender Event instance exceptions (changes to a single event within a recurring series) aren't
+included in backup and restore.