Excel - Count number of occurrences of number string with Criteria - excel

Question

I've looked around here, and other online sources but can't seem to find the solution to what I'm after.
I have a data table with 78,000 rows. The table is set up as follows:
A B C
Issue Client ID Ticket Number
Printer Jam 123456 HP-123
Monitor 987654 HP-124
Keyboard 123456 HP-125
Printer Jam 123456 HP-126
Keyboard 987654 HP-127
Printer Jam 987654 HP-128
This goes on and on. I need to count the number of times a Client ID appears for each Issue, so that I can report the number of repeat "offenders" on it like this:
Issue 1 2 2+
Keyboard 2 0 0
Printer Jam 1 2 0
Hopefully that makes sense! I've tried using a Pivot Table, and while it gives me the counts I need it doesn't really do what I need.
Thanks!

Answer 1

I would probably use COUNTIFS together with a pivot table if I had to do this:
COUNTIFS will be moderately slow due to the size of your data, but the pivot table will make the grouping part relatively fast.
From the picture, I am using this for the COUNTIFS:
=COUNTIFS(A:A,A2,B:B,B2)

Answer 2

Use the following:
=SUMPRODUCT(--(COUNTIFS($A$2:$A$7,$E2,$B$2:$B$7,$B$2:$B$7,$A$2:$A$7,$A$2:$A$7)=1))
Change the =1 to =2 and >2 for the next columns.

Answer 3

This solution uses two PivotTables and one Range.
It assumes the DATA range is located at B6:D111111
Add a PivotTable (PtCount), with the DATA range as source and starting at G6, to obtain the Issue \ Client Id counts. (see Fig. 1 below)
Fig. 1
Change the settings of the PivotField "Issue", by right clicking the PivotField then click on Field Settings… \ tab Layout & Print \ Repeat item labels (see Fig. 2 below)
Fig. 2
Use a Range, located at L6 and parallel to the PivotTable (PtCount), to manipulate the PivotTable results (i.e. change counts higher than 2 to "2+". (see fig. 3)
The range should have these items\formulas:
Issue : =T($G7)
Count : =IF(EXACT($L7,""),"",$I7)
Offenders : =IF(EXACT($L7,""),"",IF($I7>2,"2+",$I7))
Fig. 3
Add a second PivotTable (PtSummary), with the Range starting at L6 as source and located at G6, to generate the final report. (see fig. 4)
Fig. 4