IIS calls Microsoft. Office. InterOP. Word. Documents. Open and returns NULL
Control Panel-> Administrative Tools-> component services-> Computer-> my computer-> DCOM configuration-> Microsoft Word documents
After
Click properties to open the Properties dialog box for this application.
2. Click the ID tab and select an interactive user.
3. Click the "Security" tab, select "Custom" in the "Start and activate Permissions" and "Access Permissions" groups, and then
Custom-> edit-> Add ASP. NET account and iuser _ computer name
* These accounts only exist when IIS is installed on the computer.
4. Make sure that each user is allowed to access the service and click OK.
5. Click OK to disable dcomcnfg.
If you cannot see Microsoft offfice word in the component service, you need to reinstall the office.
IIS calls Microsoft. Office. InterOP. Word. Documents. Open and returns NULL