Hi,

So the error you’re seeing is when MSIEXEC is being called with an invalid option or parameter, but of course you’re running this via the normal installer so that’s not something you’re defining.

If you go to %ProgramData%\Veeam\Backup365\Logs\Setup you’ll find the install logs and can troubleshoot what it’s calling incorrectly.

However, I imagine you just want to upgrade and move on, as you’re on an old version of 5, I’d suggest upgrading to the latest version of 5 and then trying again. The version you’re on IS on the upgrade supported list so it should work okay, but as you’re clearly seeing it’s not

Thanks for the quick response. I have tried to upgrade to version6 earlier. it was giving the same response.

Today, i have upgraded to the latest version of the version5 using an MSI file installation. it was working fine. but again upgrade to version 7 was hittng and error. 

The extracts from Veeam.Archiver.Autorun.lo file is listed below.

p12.07.2023 12:35:05.279]    1 (13264) Product Veeam Backup and Replication Server found in the registry with version: 12.0.0.1420
r12.07.2023 12:35:05.280]    1 (13264) Veeam Explorer for Microsoft Teams's feature BR_TEAMSEXPLORER is installed.
<12.07.2023 12:35:05.280]    1 (13264) Veeam Explorer for Microsoft Teams's feature PS_TEAMSEXPLORER is installed.
d12.07.2023 12:35:05.312]    1 (13264) Patch file found. Added one more step
s12.07.2023 12:35:05.313]    1 (13264) 5 steps will be executed
e12.07.2023 12:35:05.321]    1 (13264) Executing step: Veeam Backup for Microsoft 365 (installation parameters: BR_OFFICE365,CONSOLE_OFFICE365,PS_OFFICE365,REST_OFFICE365, removal parameters: <null>)...
&12.07.2023 12:35:05.335]    1 (13264) MSI start: /i E:\From C Drive Backup\VeeamBackupMicrosoft365_7\Backup\Veeam.Backup365.msi ADDLOCAL="BR_OFFICE365,CONSOLE_OFFICE365,PS_OFFICE365,REST_OFFICE365" REMOVE=""  /qn ACCEPT_THIRDPARTY_LICENSES=1 ACCEPT_EULA=1 /l*v "C:\ProgramData\Veeam\Backup365\Logs\Setup\Veeam.Backup365_2023_07_12_12_35_05.log"
_12.07.2023 12:35:05.341]    5 (11984) Starting msiexec.exe...
s12.07.2023 12:35:07.386]    5 (11984) Finished msiexec process. Exit code: 1639
E12.07.2023 12:35:09.222]    1 (13264) Closing setup…
 

I cannot see any files inside the folder  %ProgramData%\Veeam\Backup365\Logs\Setup.

Maybe try upgrade v5 to the latest release listed on this page then try upgrading to v7 again - Upgrading Veeam Backup for Microsoft 365 - Veeam Backup for Microsoft 365 Guide

Maybe this will fix something if there is an issue in the installation files on the server.

Hi,

msiexec error code 1639 is invalid path, does this file exist:

“E:\From C Drive Backup\VeeamBackupMicrosoft365_7\Backup\Veeam.Backup365.msi”