Using Redemption (RDO) Can No Longer Change Other User's Mailbox Contact Items
<p>I have a program running under an admin account, who is a power user who has write permissions into other Exchange mailboxes. Using the old Exchange 2003 server (name altered for illustration purposes), I was able to:</p>

<pre><code>session.LogonExchangeMailbox(usrEmail,"old.Exchange2003.com");
</code></pre>

<p>and make changes to the user's contacts.</p>

<p>After migration to the new Exchange 2010 server (name altered), no changes are reflected into user's mailbox.</p>

<pre><code>session.LogonExchangeMailbox(usrEmail, "new.Exchange2010.com")
</code></pre>

<p>NOR </p>

<pre><code>session.LogonExchangeMailbox(UserPrincipal.Current.EmailAddress, "new.Exchange2010.com");
session.GetSharedMailbox(usrEmail);

//followed by attempts to change the user's contacts.
</code></pre>

<p>What is missing? I would appreciate any ideas helping to solve this issue. Thanks!</p>