getting UID higher that 99999

[The_Eye_In_The_Sky]

Dear all,

my company is a quite big Unix vendor, thus the NIS is using UID higher 
99999. To synchronize the Ubuntu with other Linux and Unix server, I 
need to make it capable addressing UID higher than 99999. Do you which 
setup I need to tweak?

Please advice and thanks in advance.
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