0xE0008516 Snapshot technology Error", Exchange 2013

Hello.

After a year the customer's Exchange 2013 server cannot be backed up with GRT option because the application backup ends with an error.

V-79-57344-34070 - Snapshot Technology: Initialization failure on: "Microsoft Information Store". Snapshot technology used: Microsoft Volume Shadow Copy Service (VSS). Snapshot technology error (0xE0008516): The database specified for the snapshot was not backed up because the database was not mounted. Check the Windows Event Viewer for details. V-79-57344-34070 - Snapshot Technology: Initialization failure on: "Microsoft Information Store". Snapshot technology used: Microsoft Volume Shadow Copy Service (VSS). Snapshot technology error (0xE0008516): The database specified for the snapshot was not backed up because the database was not mounted.

The database is definitely mounted.

I'm not sure if the Exchange application or OS were not updated before the error occurence.

I went through many articles how to solve the issue but nothing helped.

Configuration:

BE 14.2.1180.3142 FP-5

MS Exchange 2013

I attached:

1\ writers list

C:\Windows\system32>vssadmin list providers
vssadmin 1.1 - Volume Shadow Copy Service administrative command-line tool
(C) Copyright 2001-2013 Microsoft Corp.

Provider name: 'Microsoft File Share Shadow Copy provider'
   Provider type: Fileshare
   Provider Id: {89300202-3cec-4981-9171-19f59559e0f2}
   Version: 1.0.0.1

Provider name: 'Microsoft Software Shadow Copy provider 1.0'
   Provider type: System
   Provider Id: {b5946137-7b9f-4925-af80-51abd60b20d5}
   Version: 1.0.0.7

2\ app log

 in attachement

Thanks for your opinion.

Regards

Lumir