Adding note about read permission for reseting last access date.
diff --git a/src/overview.html b/src/overview.html
index ee0ecef..e0c9b74 100644
--- a/src/overview.html
+++ b/src/overview.html
@@ -116,6 +116,15 @@
</dd>
</dl>
+<h3>Document Last Access Dates</h3>
+<p>The adaptor attempts to restore the last access date for documents after
+it reads the document content during a crawl. In order for the last access
+date to be restored back to the original value before the content was read,
+the user account that the adaptor is running under needs to have write permission.
+If the account has read-only permission and not write permission for documents,
+then the last access date for documents will change as the adaptor reads
+document content during a crawl.
+
<h3>File System Adaptor Acl Overview</h3>
<p>ACLs for documents and folders are read, preserved and pushed to the Google
