Change some field separators in awk

I have a input file 1.txt

[e-mail]:1802752:2222:
[e-mail]:1802756:111113
[e-mail]:xxmyaduh:13@;:3A

and I want an output file: out.txt

[e-mail]||o||1802752||o||2222:
[e-mail]||o||1802756||o||111113
[e-mail]||o||xxmyaduh||o||13@;:3A

I want to replace the first two ‘:’ in 1.txt with ‘||o||’, but with the script I am using

awk -F: '{print $1,$2,$3}' OFS="||o||" 3.txt

But it is not giving the expected output. Any help would be highly appreciated.

Answer

Following sed may also help you in same.

sed 's/:/||o||/;s/:/||o||/'  Input_file

Explanation: Simply substituting 1st occurrence of colon with ||o|| and then 2nd occurrence of colon now becomes 1st occurrence of colon now and substituting that colon with ||o|| as per OP’s requirement.