I know that upgrading from R6.5.x to R9.0.1 (in one step) is not supported by IBM.

IBM says:

"If you are running a release of Notes/Domino prior to 8.0, you should upgrade to at least Notes/Domino 8.0 before installing and upgrading to Notes/Domino 9.0. Upgrading from prior versions may work but is not tested or officially supported."

The steps would be:

1) update Domino Servers (1 Domino for Mail, 1 Domino for Apps with no web applications - only notes with @formula + LotusScript)

2) leave Lotus Clients in version 6.5 (about 1000 users), but update these in the next 4 months (I hope)

3) after migration, do not modify Notes applications using Domino Designer 9, only use Domino Designer 6.5 until ALL clients has migrated to Notes 9.

Thanks for the comments that can give me
 

I understand it is not supported but should work.  Even it was supported I would test the software package out.    You can upgrade the servers in 2 steps (8.x and then 9.01) as you only have a few of those.

Some suggestions would be to upgrade mail file to 9.01 design as  each user gets upgraded

Compact all local files to latest ods

Make sure all local files get the latest design (names.nsf, log.nsf , journal.nsf if you have one)

Once all users are upgraded look at the new features such as idvault

Hello Barry,

I recently completed the migration of 4 server (in cluster environment) from version 6.5.4 (32bit on windows 2003) to version 9.0.1 on windows 2012 64 bit. The migration was transparent and users report better access speed applications

Previously, a testing laboratory was installed, and ALL lotus applications worked perfectly. (not web applications).

Thanks for your help, now I migration 1000 lotus notes clientes using MS System Center, and InstallShield Tunner for Lotus Notes. I have not finished assembling the package installation, but it seems something simple.

Again, thank you very much for your help, and I recommend everyone to do the upgrade.

regards

www.itfactory.com.ar

When packaging the Notes 9.01 client I would suggest bundling the latest fp and imbedded Sametime client .

Also if you have a client already installed IBM has a great command line client called NICE http://www-01.ibm.com/support/docview.wss?uid=swg21459714 that would remove all previous clients installed

You also would want to look at user policies and single sign on

Here is some info client installs

http://www-01.ibm.com/support/knowledgecenter/SSKTMJ_8.0.1/com.ibm.help.domino.admin.doc/DOC/H_USING_NOTES_SILENT_INSTALLATION_ON_WINDOWS_STEPS.html?lang=en