Upgrade licensing questions 1

[Brampie]

I need some help with these following questions about upgrade licenses. The techinical bulletins are not that clear to me, English is not my native language.

there are three systems;
[ul]
[li]IP Office 500 V2 R9.0, 9.0.300.941 and we want to upgrade to R 9.1, 9.1.100.10 do you need a R9.1 upgrade license? Not sure if we need the upgrade license for this one.[/li]
[/ul]
[ul]
[li]IP Office 500 V2 R8.1, 8.1 (81) this one goes directly to R9.1 , 9.1.100.10 with the R9.1 upgrade license[/li]
[/ul]
[ul]
[li]IP Office 500 V2 R8.1, 8.1 (63) also an upgrade to R9.1, 9.1.100.10. I think you need to two licenses one to upgrade to 8.1.65 and then again to 9.1.100.10. Which upgrade license(s) do I need for this one?[/li]
[/ul]

 

[Pepp77]

For all 3 systems you need a 9.1 upgrade licence. Nothing less, nothing more

However I would advise upgrading to 9.1.4 rather than 9.1.100 as 9.1.4 has been stable for me, but 9.1.5 not quite as so.

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