Exchange online backup fails. possible Corrupt index?

Hello,

I have a problem with our exchange online backup.  

When i start a new backup job, the job get an error:

Error Code: [82:229]
Description: The job is pending because: The remote end hi-back-ms02 has closed network connection unexpectedly
Source: hi-back-ma06, Process: cvd

This job is still running, but the streams stops one by one with error: 

Agent [hi-back-ms01_Remote4] ended prematurely due to [].

Some relevant parts from the job log:

5300  4760  05/07 14:08:25 1679359 Servant    Remote Stream Allocation request for [14] streams of type [1] received. Request Identifier [Global\1679359_3048_1715083746_WAIT$Global\1679359_3048_1715102172_SHM]. Client [hi-back-ms01]
5300  2fec  05/07 14:08:37 1679359 Resource Alloc Obj Sending resource allocation response. Successfully allocated [14] of [14] streams. Request Identifier [Global\1679359_3048_1715083746_WAIT$Global\1679359_3048_1715102172_SHM].
5300  24c0  05/07 14:09:04 1679359 Scheduler  Set pending cause [The job is pending because: The remote end hi-back-ms02 has closed network connection unexpectedly]::Client [hi-back-ma06] Application [cvd] Message Id [1375731870] Error code [82:158] RCID [0] ReservationId [0].  Level [0] flags [0] id [0] overwrite [0] append [0] CustId[1375731941].
5300  3ce4  05/07 14:09:04 1679359 Servant    Remote free streams request received for rcid [6980419]
5300  42a8  05/07 14:09:14 1679359 Scheduler  Ignored pending cause [The job is pending because: The remote end hi-back-ms01 has closed network connection unexpectedly]::Client [hi-back-ma06] Application [cvd] Message Id [1375731870] RCID [0] Reservation Id [0].  Level [0] flags [0] id [0] overwrite [0] append [0] CustId[1375731941].
5300  4a3c  05/07 14:09:14 1679359 Servant    Remote free streams request received for rcid [6980428]

96345 18658 05/07 14:09:04 1679359 SdtBase::setLastErr: Setting last err [93][The remote end hi-back-ms02 has closed network connection unexpectedly] RCId [6980419]
96345 18658 05/07 14:09:04 1679359 SdtTail::onIncomingData: Client [SDTPipe_hi-back-ms02_hi-back-ma06_1679359_1715083726_14776_10452_0000019A73FAD010]. Id [90]. Cannot recv message from the tail. Error [The remote end hi-back-ms02 has closed network connection unexpectedly][93] RCId [6980419]
96345 564f3 05/07 14:09:04 1679359 SdtTailSrv::DropClientWorker: Removing Client [SDTPipe_hi-back-ms02_hi-back-ma06_1679359_1715083726_14776_10452_0000019A73FAD010], Id [90] from the list. RCId [6980419]
96345 564f3 05/07 14:09:04 1679359 SdtTailSrv::DropClientWorker: Size of selected list [2] RCId [6980419]
96345 564f3 05/07 14:09:04 1679359 SdtTailSrv::DropClientWorker: Not draining away incoming data because the socket was closed. Graceful [0] RCId [6980419]
96345 564f3 05/07 14:09:04 1679359 [DSBACKUP   ] 6980419-5936161 CVMABackup object destroyed..

6792  1838  05/07 14:08:58 1679359 Corrupt data file, Failed to get marker 0x02 at location 70
6792  1838  05/07 14:08:58 1679359 Corrupt data file, Failed to get marker 0x02 at location 70
6792  1838  05/07 14:08:58 1679359 Corrupt data file, Failed to get marker 0x02 at location 70
6792  1838  05/07 14:08:58 1679359 Corrupt data file, Failed to get marker 0x02 at location 70
6792  1838  05/07 14:08:58 1679359 unhandled conversion case in fetchPropertyValue(): 0xa000d00
6792  1838  05/07 14:08:58 1679359 Failed to capture metedata for data file [C]

6792  6     05/07 14:08:58 1679359 ### myDelegate - Mailbox: [xx@xx.no], potentially problematic email. Details: File path [C:\Program Files\Commvault\ContentStore\iDataAgent\JobResults\CV_JobResults\2\2\1679359\28CA6C19X19B7X431AX85B3X29384F8AC388\3_6_6792], itemid [AAMkADQzN2M1YjM2LWI5ZjMtNDY2NC1hNzgzLWRjZTliMDI5YTA2ZgBGAAAAAADX0SMRKm7LT4finj3QYrIoBwBtIwDhJJl0Sajxri+BZ4ZmAAAAAAEMAADi+8Qv8d9BSrjUmYnInRZ9AAB/+AURAAA=]
6792  6     05/07 14:08:58 1679359 ### myDelegate - This item will be skipped from backup, remove the item from this mailbox using the itemid.

I have been searching for a solution, and found this post: 

https://kb.commvault.com/article/53856 

I guess this might be related to the same problem as i got, but this article describes …\ContentStore\iDataAgent\jobResults\CV_CLDB. and that is not the correct folder for Exchange online index? 

What is the best solution for this problem?   Should i restore the Index as described in this article:

https://documentation.commvault.com/11.24/expert/restoring_index_server_to_same_location.html

Or is there a better way to resolve this? 

Best regards,

Magnus Frøyseth