AcroRdrDCx642200220191_MUI.exe installs version 21.007.20091

I've managed to figure this out on my own.  The new installer has all of the language components in a separate CAB file, and you have to explicitly tell it you want all languages; it seems they are migrating away from separate MUI installers in general.

LANG_LIST="cs_CZ,da_DK,de_DE,en_AE,en_IL,en_US,es_ES,fi_FI,fr_FR,fr_MA,hu_HU,it_IT,ja_JP,ko_KR,nb_NO,nl_NL,pl_PL,pt_BR,ru_RU,sk_SK,sl_SI,sv_SE,tr_TR,uk_UA,zh_CN,zh_TW"

Add this MSI parameter to your command line and it should simulate the x86 MUI behavior.  Would be great if you could just say "LANG_LIST=All", but until then....

Hi Jonathan,

Hope you are doing well.

Do you have the Acrobat Reader DC installed already and trying to install the latest update, or are you trying to install the application for the first time from AcroRdrDCx642200220191_MUI.exe setup?

1- Open the Acrobat Reader DC downloaded on your system and navigate to Help>Chcek for updates.

2- If that doesn't help, then run this cleaner tool to remove the existing setup and download it from here: 

https://get.adobe.com/reader/enterprise/ 

Check the version, whether you have got the updated one or not. 

Let us know the result.

Thanks,

Akanchha