Add/modify a registry value to point to the exchange-oma

1. Click Start, click Run, type regedit, and then click OK.

2. Locate the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MasSync\Parameters

3. On the right panel, make sure ExchangeVDir points to /exchange-oma. If the value of ExchangeVDir is ExchDAV, you should change it to /exchange-oma. Note: the ExchangeVDir and exchange-oma are case sensitive. In the Value data box, you must enter a forward slash (/) following by exchange-oma. Click OK.

4. If there is not ExchangeVDir, you need to create it. Right-click Parameters, click to New, and then click String Value. Type ExchangeVDir, and then press ENTER. Right-click ExchangeVDir, and then click Modify.

5. Quit Registry Editor.

6. 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.