Summary

In case of any errors appear at the fist step of OBRM Exchange backup wizard (after entering Windows credentials to to connect to the Exchange server - screenshots are provided below), it is needed to localize the problem: whether it is an Exchange server issue or OBRM issue.

User-added image

User-added image

Solution
It is needed to provide a test connection to the Exchange server via PowerShell (from the same machine where OBRM and Exchange is installed ):
<<<<<<<<<<
According to Microsoft Knowledge Base Article:
https://technet.microsoft.com/en-us/library/jj984289%28v=exchg.160%29.aspx
please, open PowerShell (not Exchange PowerShell) and type following commands:
1-
type (without quotes):
\$UserCredential = Get-Credential
hit Enter
(The window will appear which asks you to enter credentials - enter then in form of
domainname\login and password which you use to open Exchange Management Console)
the user should be "Exchange administrator" and "local administrator" at the Exchange Server

2 -
type (general pattern, without quotes and newlines):
"\$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri http:// </strong>/powershell?serializationLevel=Full -Authentication Kerberos -AllowRedirection"
is fully qualified domain name of the exchange server i.e. email.mytestcompany.com

3 -
If the command #2 ran successfully, type:
Import-PSSession \$Session
(at this step, connection to Exchange Server is established).

4 -
run
Get-Mailbox
The command will show all mailboxes available in the Exchange database.

5 -
close the session using:
Remove-PSSession \$Session
> > > > > > > > > >

If the same error appears when running the above commands, the issue is caused by the Exchange Server settings or Windows credentials used to connect to the Exchange server.
The next step is to save the error message and search for solutions in Microsoft knowledge base articles.

If the above test completes without errors but OBRM application is still reporting the same error, please, contact support and provide screenshots of the error for further investigation.</p> *[AES]: Advanced Encryption Standard *[AESs]: Advanced Encryption Standards *[API]: application programming interface *[APIs]: application programming interfaces *[AWS]: Amazon Web Services *[AWSs]: Amazon Web Servicess *[BMR]: BareMetal Restore *[BMRs]: BareMetal Restores *[CAB]: Cloud Application Backup *[CABs]: Cloud Application Backups *[CB]: Cloud Backup *[CBs]: Cloud Backups *[CBT]: Changed Block Tracking *[CBTs]: Changed Block Trackings *[CFA]: cloud failover appliance *[CFAs]: cloud failover appliances *[CIFS]: Common Internet File System *[CIFSs]: Common Internet File Systems *[DC]: data center *[DCs]: data centers *[DDFS]: deduplication file system *[DDFSs]: deduplication file systems *[DPS]: Data Protection Server *[DPSs]: Data Protection Servers *[DR]: disaster recovery *[DRs]: disaster recoverys *[DRaaS]: Disaster Recovery as a Service *[DRaaSs]: Disaster Recovery as a Services *[GCP]: Google Cloud Platform *[GCPs]: Google Cloud Platforms *[ICAB]: Infrascale Cloud Application Backup *[ICABs]: Infrascale Cloud Application Backups *[ICB]: Infrascale Cloud Backup *[ICBs]: Infrascale Cloud Backups *[ICMP]: Internet Control Message Protocol *[ICMPs]: Internet Control Message Protocols *[IDR]: Infrascale Disaster Recovery *[IDRs]: Infrascale Disaster Recoverys *[IPMI]: Intelligent Platform Management Interface *[IPMIs]: Intelligent Platform Management Interfaces *[JVM]: Java virtual machine *[JVMs]: Java virtual machines *[LVM]: logical volume management *[LVMs]: logical volume managements *[MFA]: multi-factor authentication *[MFAs]: multi-factor authentications *[MSP]: managed services provider *[MSPs]: managed services providers *[N/A]: Not applicable *[N/As]: Not applicables *[NAS]: network-attached storage *[NASs]: network-attached storages *[NAT]: network address translation *[NATs]: network address translations *[NFS]: Network File System *[NFSs]: Network File Systems *[NIC]: network interface controller *[NICs]: network interface controllers *[NTP]: Network Time Protocol *[NTPs]: Network Time Protocols *[NTPD]: Network Time Protocol Daemon *[NTPDs]: Network Time Protocol Daemons *[OBRM]: Online Backup and Recovery Manager *[OBRMs]: Online Backup and Recovery Managers *[PBKDF2]: Password-Based Key Derivation Function 2 *[PBKDF2s]: Password-Based Key Derivation Function 2s *[POSIX]: Portable Operating System Interface for Unix *[POSIXs]: Portable Operating System Interface for Unixs *[RAID]: Redundant Array of Independent Disks *[RAIDs]: Redundant Array of Independent Diskss *[RCT]: resilient change tracking *[RCTs]: resilient change trackings *[ROM]: read-only memory *[ROMs]: read-only memorys *[SDK]: software development kit *[SDKs]: software development kits *[SMB]: Server Message Block *[SMBs]: Server Message Blocks *[SMTP]: Simple Mail Transfer Protocol *[SMTPs]: Simple Mail Transfer Protocols *[SNMP]: Simple Network Management Protocol *[SNMPs]: Simple Network Management Protocols *[UCAR]: unique content addressable repository *[UCARs]: unique content addressable repositorys *[UEFI]: Unified Extensible Firmware Interface *[UEFIs]: Unified Extensible Firmware Interfaces *[UNC]: Universal Naming Convention *[UNCs]: Universal Naming Conventions *[vCFA]: virtual cloud failover appliance *[vCFAs]: virtual cloud failover appliances *[VM]: virtual machine *[VMs]: virtual machines *[VNC]: Virtual Network Computing *[VNCs]: Virtual Network Computings *[vNIC]: virtual network interface controller *[vNICs]: virtual network interface controllers *[VPN]: virtual private network *[VPNs]: virtual private networks *[VSS]: Volume Shadow Copy Service *[VSSs]: Volume Shadow Copy Services