Microsoft Exchange 2016 and OwaVersion:Exchange2013

During the study of Exchange 2016 RTM I noticed one thing - "OwaVersion" of OWA Virtual Directory is "Exchange2013". CU1 - CU14 still no changed it.

[PS] C:\Windows\system32>Get-ExchangeServer | fl AdminDisplayVersion
AdminDisplayVersion : Version 15.1 (Build 466.34)

[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl OWAVersion
OwaVersion : Exchange2013

Resetting virtual directory does not help.

Even change the "msExchOWAVersion" attribute of "owa (Default Web Site)" (CN=owa (Default Web Site),CN=HTTP,CN=Protocols,CN=EXCHANGE,CN=Servers,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=First Organization,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=test,DC=local) from "4" to "5" does not help.

What is the meaning of this attribute? Surprisingly - "Gets the version of Outlook Web App (OWA) running on the server" / "Specifies version information for Outlook Web App".
I guess it's a little mistake or legacy and unused attribute. We'll see.

Update (03.10.2016)
Exchange 2016 CU3 still has "Exchange2013" in "OwaVersion" attribute.
[PS] C:\Windows\system32>Get-ExchangeServer | fl AdminDisplayVersion
AdminDisplayVersion : Version 15.1 (Build 544.27)
[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl OWAVersion
OwaVersion : Exchange2013

Update (01.02.2017)
Exchange 2016 CU4 still has "Exchange2013" in "OwaVersion" attribute.
[PS] C:\Windows\system32>Get-ExchangeServer | fl AdminDisplayVersion
AdminDisplayVersion : Version 15.1 (Build 669.32)
[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl OWAVersion
OwaVersion : Exchange2013

Update (07.04.2017)
Exchange 2016 CU5 still has "Exchange2013" in "OwaVersion" attribute.
[PS] C:\Windows\system32>Get-ExchangeServer exchange | fl AdminDisplayVersion
AdminDisplayVersion : Version 15.1 (Build 845.34)
[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl OWAVersion
OwaVersion : Exchange2013

Update (29.07.2017)
Exchange 2016 CU6 still has "Exchange2013" in "OwaVersion" attribute.
[PS] C:\Windows\system32>Get-ExchangeServer exchange | fl AdminDisplayVersion
AdminDisplayVersion : Version 15.1 (Build 1034.26)
[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl OWAVersion
OwaVersion : Exchange2013

Update (08.10.2017)
Exchange 2016 CU7 still has "Exchange2013" in "OwaVersion" attribute.
[PS] C:\Windows\system32>Get-ExchangeServer | fl AdminDisplayVersion
AdminDisplayVersion : Version 15.1 (Build 1261.35)
[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl OWAVersion
OwaVersion : Exchange2013

Update (13.01.2018)
Exchange 2016 CU8 still has "Exchange2013" in "OwaVersion" attribute.
[PS] C:\Windows\system32>Get-ExchangeServer | fl AdminDisplayVersion
AdminDisplayVersion : Version 15.1 (Build 1415.2)
[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl OWAVersion
OwaVersion : Exchange2013

Update (08.04.2018)
Exchange 2016 CU9 still has "Exchange2013" in "OwaVersion" attribute.
[PS] C:\Windows\system32>Get-ExchangeServer | fl AdminDisplayVersion
AdminDisplayVersion : Version 15.1 (Build 1466.3)
[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl OWAVersion
OwaVersion : Exchange2013

Update (07.07.2018)
Exchange 2016 CU10 still has "Exchange2013" in "OwaVersion" attribute.
[PS] C:\Windows\system32>Get-ExchangeServer | fl AdminDisplayVersion
AdminDisplayVersion : Version 15.1 (Build 1531.3)
[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl OWAVersion

OwaVersion : Exchange2013

Update (27.10.2018)
Exchange 2016 CU11 still has "Exchange2013" in "OwaVersion" attribute.
[PS] C:\Windows\system32>Get-ExchangeServer | fl AdminDisplayVersion
AdminDisplayVersion : Version 15.1 (Build 1591.10)
[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl OWAVersion
OwaVersion : Exchange2013

Update (24.03.2019)
Exchange 2016 CU12 still has "Exchange2013" in "OwaVersion" attribute.
[PS] C:\Windows\system32>Get-ExchangeServer | fl AdminDisplayVersion
AdminDisplayVersion : Version 15.1 (Build 1713.5)
[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl OWAVersion
OwaVersion : Exchange2013

Update (28.07.2019)
Exchange 2016 CU13 still has "Exchange2013" in "OwaVersion" attribute.
[PS] C:\Windows\system32>Get-ExchangeServer | fl AdminDisplayVersion
AdminDisplayVersion : Version 15.1 (Build 1779.2)
[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl OWAVersion
OwaVersion : Exchange2013

Update (05.11.2019)
Exchange 2016 CU14 still has "Exchange2013" in "OwaVersion" attribute.
[PS] C:\Windows\system32>Get-ExchangeServer | fl AdminDisplayVersion
AdminDisplayVersion : Version 15.1 (Build 1847.3)
[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl OWAVersion
OwaVersion : Exchange2013

Update (03.05.2020)
Exchange 2016 CU15 still has "Exchange2013" in "OwaVersion" attribute.
[PS] C:\Windows\system32>Get-ExchangeServer | fl AdminDisplayVersion
AdminDisplayVersion : Version 15.1 (Build 1913.5)
[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl OWAVersion
OwaVersion : Exchange2013

Update (03.05.2020)
Exchange 2016 CU16 still has "Exchange2013" in "OwaVersion" attribute.
[PS] C:\Windows\system32>Get-ExchangeServer | fl AdminDisplayVersion
AdminDisplayVersion : Version 15.1 (Build 1979.3)
[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl OWAVersion
OwaVersion : Exchange2013

Applies to:

• Exchange 2016 RTM
• Exchange 2016 CU1
• Exchange 2016 CU2
• Exchange 2016 CU3
• Exchange 2016 CU4
• Exchange 2016 CU5
• Exchange 2016 CU6
• Exchange 2016 CU7
• Exchange 2016 CU8
• Exchange 2016 CU9
• Exchange 2016 CU10
• Exchange 2016 CU11
• Exchange 2016 CU12
• Exchange 2016 CU13
• Exchange 2016 CU14
• Exchange 2016 CU15
• Exchange 2016 CU16