should i configure: Network security: LAN Manager authentication level

Hi,

I run a small company domain.

these are the operating systems I run:

Servers:
2008 R2
2012
2012 R2

Clients:
Windows 7
Windows 10
Mac OSX

IP Devices connected to the network:

Printers
IP Camera's (AXIS)
Audiocodes Gateway
Polycom VVX IP Phones
Snom IP Phones
Synology iSCSI Storage Array
Digi Anywhere USB/2


the reason I am asking is that I see the following Event when my servers boot:

EVENT 6038 LSA (LsaSrv)
Microsoft Windows Server has detected that NTLM authentication is presently being used between clients and this server. This event occurs once per boot of the server on the first time a client uses NTLM with this server.
 
NTLM is a weaker authentication mechanism. Please check:
 
      Which applications are using NTLM authentication?
      Are there configuration issues preventing the use of stronger authentication such as Kerberos authentication?
      If NTLM must be supported, is Extended Protection configured?


From what I have read the most secure setting will be: Level 5 - Send NTLMv2 response only. Refuse LM & NTLM
https://technet.microsoft.com/en-us/library/jj852207.aspx

I am worried this will cause problems with network access.

What is the best practice?

Many Thanks

Jack