I've browsed around for info on this issue a while ago and came up with this:
For Backup Exec for Windows NT v8.x:
1. Close Backup Exec.
2. Stop all the Backup Exec services.
3. Run "Regedt32.exe" from either a command prompt or through Windows NT Explorer.
4. Locate and highlight the following registry key:
Registry Path: /HKEY_Local_Machine/Software/Veritas/Adamm/
5. On the Registry menu, select Edit | Add Key
6. In the "Key Name" field, type "Alerts" (do not include the quotes).
7. Select "OK".
While highlighting the "Alerts" key (created in step #6), select Edit | Add Value from the menu.
8. In the "Value Name" field, type "Remove Media Response" (do not include the quotes).
9. In the "Data Type" field, select "REG_DWORD".
10. Select "OK".
11. Change the "Radix" to "Decimal".
12. In the "Data" field, enter a numerical value (1, 2 or 3), knowing that:
Yes or OK = 1
No = 2
Cancel = 3
13. Select "OK".
14. While highlighting the "Alerts" key (created in step #6), select Edit | Add Value from the menu.
15. In the "Value Name" field, type "Remove Media Timeout" (do not include the quotes).
16. In the "Data Type" field, select "REG_DWORD".
17. Select "OK".
18. Change the "Radix" to "Decimal".
19. In the "Data" field, enter the number of seconds Backup Exec should wait before responding to the alert. For example, entering 30 means that Backup Exec will respond to the alert after 30 seconds. After all the values have been entered, restart the Backup Exec services.
Note: A value of 0 means infinite timeout (i.e. no timeout).
I haven't tested this out yet, but it makes sense to me. Let us know how that turns out.
In a world without walls and fences, who needs Windows and Gates?