Iphone calendar sync to exchange is one-way, mail & contacts working

Question

i had a problem where i was getting nothing from the exchange server ( SBS2003 ) in my calendar... but if i added something to my iphone 3g, it would show up in outlook. my iphone 2.2.1, ipod touch 2.2.1, and dev iphone using 3.0b5 all were the same.
Mail and Contacts worked fine, but not the calendars... i could create a new calendar in outlook and the phone would show that i had another calendar, but no actual items were being sync'd.
When i tried to create a new exchange account to test, I was unable to sync, and would get the error: The error is "Unexpected Exchange mailbox Server error: Server: [] User: [] HTTP status code: [409]. Verify that the Exchange mailbox Server is working correctly." in the Event Log
I hate when I spend days looking online for solutions and never find out what works because people don't post their successes, so I thought I should post this, because it seemed to fix my problem.
BUT - i should say that when it came down to the registry modification, the entry was already there, and set to /exchange-oma, but i changed it to my newly created virtual directory, and poof, my problem was solved. I found what you see below here: http://sbs.seandaniel.com/2006/02/sync-errors-from-mobile-devices-in.html
...hope this helps someone... not sure what caused it other than my continually formatting and re-syncing my dev phone.
1. Start Internet Information Services (IIS) Manager.
2. Locate the Exchange virtual directory. The default location is the following: Web Sites\Default Web Site\Exchange
3. Right-click the Exchange virtual directory, click All Tasks, and then click Save Configuration to a File.
4. In the File name box, type a name. For example, type ExchangeVDir. Click OK.
5. Right-click the root of this Web site. Typically, this is Default Web Site.
6. Click New, and then click Virtual Directory (from file).
7. In the Import Configuration dialog box, click Browse, locate the file that you
8. Created in step 4, click Open, and then click Read File.
9. Under Select a configuration to import , click Exchange, and then click OK.
10. A dialog box will appear that states that the "virtual directory already exists."
11. In the Alias box, type a name for the new virtual directory that you want Exchange ActiveSync and Outlook Mobile Access to use. For example, type ExchDAV.
[N.B. In my case I already had an ExchDAV, so I created it as ExchDAV2]
12. Click OK.
13. Right-click the new virtual directory. In this example, click ExchDAV. Click Properties. Click the Directory Security tab. Under Authentication and access control, click Edit. Make sure that only the following authentication methods are enabled, and then click OK:
a. Integrated Windows authentication
b. Basic authentication
14. Under IP address and domain name restrictions, click Edit. Click Denied access, click Add, click Single computer, type the IP address of the server that you are configuring, and then click OK.
15. Under Secure communications, click Edit. Make sure that Require secure channel (SSL) is not enabled, and then click OK.
16. Click OK, and then close the IIS Manager.
17. Click Start, click Run, type regedit, and then click OK.
18. Locate the following registry subkey: HKEYLOCALMACHINE\SYSTEM\CurrentControlSet\Services\MasSync\Parameters
19. Right-click Parameters, click to New, and then click String Value.
20. Type ExchangeVDir, and then press ENTER. Right-click ExchangeVDir, and then click Modify.
NoteExchangeVDir is case-sensitive. If you do not type ExchangeVDir exactly as it appears in this article, ActiveSync does not find the key when it locates the ExchDAV folder.
21. In the Value data box, type the name of the new virtual directory that you created preceded by a forward slash (/). For example, type /ExchDAV.
[OR in may case, it was already set to /ExchDAV so mine needed to be renamed to /ExchDAV2]
22. Click OK.
23. Quit Registry Editor.
24. Restart the IIS Admin service. To do this, follow these steps:
a. Click Start, click Run, type services.msc, and then click OK.
b. In the list of services, right-click IIS Admin service, and then click Restart

Answer 1

This isn't an issue.
If you pay attention to the former steps, you'll notice that only the virtual folder being created has SSL disabled and in the meantime, communications are allowed only from the server himself.
So the IT can be confident in following those steps.
+Unfortunately, so far, those instructions didn't help me.+
In fact it finally worked.
I just needed to delete and recreate the relationship between the device and the Exchange server.
Message was edited by: Digaderfox