Activesync changes email properties

[Guest nwinton]

I sync my SP5 with 2 PCs both with Outlook.

For no apparent reason the email properties of a couple of my contacts will change from "Let Outlook decide the best sending format" to "Send using Outlook Rich Text Format".

This happens even though I have not changed anything in the contact's email address in Outlook on either PC.

The effect is that when I send attachments they are encoded incorrectly and are not received properly by the person I'm sending them to. When I change the contact's email properties back to "Let Outlook decide the best sending format" the attachments are sent properly again.

There doesn't seem to be any predictability about when the properties change which makes it hard to diagnose or find a workaround.

Does anyone know a setting on Activesync which will prevent altering of a contacts email properties or a registry tweak?

I can't find any information about it.

Any help most welcome as it's becoming a real problem for me.

TIA

[Guest JrFoxMN]

I sync my SP5 with 2 PCs both with Outlook.

For no apparent reason the email properties of a couple of my contacts will change from "Let Outlook decide the best sending format" to "Send using Outlook Rich Text Format".

<{POST_SNAPBACK}>

I'm struggling with the exact same problem. Basically my entire contact list is now "corrupted" as I can't send HTML formatted e-mail w/out editing each contact one at a time...

If someone has a solution, I'd love to hear it!!!