Conditional formatting based on list values with condition

[Doge Robert]

Greetings.
I have two tables, one with a column of customers (TblCustomer) and another table (TblCustomerTasks) with a column of customers (multiple occurances) and a column of tasks (single occurance for each customer).

I would like to have conditional formatting in a third table, where I can select the customer in column A and then the task in column B. If the task selected does NOT match one of the tasks sold to that customer in TblCustomerTasks, I need the cell to be highlighted red.

Is this possible? And if so, how?

An even better solution would be, if I could only select tasks, which where sold to a particular customer. So if I chose customer 1 in column A, then I could only select the tasks in the dropdown in column B, which where assigned to Customer 1 in TblCustomerTasks.

But it seems to me, that this may be beyond the limits of Excel... I am not certain.

What do you guys think?

 

[etaf]

what version of excel , if 2021 or 365 - you could do a dependant dropdown list using a filter - with a helper column - otherwise indirec() function

i have added all in 1 sheet - for ease of seeing here

so in
F3 - is a standard dropdown list - based on your customer table - datavalidation list

Then in column I i gave a helper list - so thats using
=SORT(FILTER($D$2:$D$13,$C$2:$C$13=$F$3),1)
which filters all the tasks based on the customer name and sorts in order of task name

then another dropdown - from the helper column - datavalidation list - But instead of range you just put =$I$2#
which looks at the array , that
=SORT(FILTER($D$2:$D$13,$C$2:$C$13=$F$3),1)

has created

Book2
	A	B	C	D	E	F	G	H	I
1	Table1sheet1		Table2-sheet2			Table3 - Dropdown			Helper
2			customer-1	task-1		customer	Task		task-2
3	customer-1		customer-1	task-2		customer-3			task-3
4	customer-2		customer-1	task-3					task-4
5	customer-3		customer-1	task-4					task-5
6			customer-1	task-5
7			customer-2	task-1
8			customer-2	task-2
9			customer-2	task-3
10			customer-3	task-4
11			customer-3	task-5
12			customer-3	task-3
13			customer-3	task-2
Sheet1

Cell Formulas
Range	Formula
I2:I5	I2	=SORT(FILTER($D$2:$D$13,$C$2:$C$13=$F$3),1)
Dynamic array formulas.

Cells with Data Validation
Cell	Allow	Criteria
F3	List	=$A$3:$A$5
G3	List	=$I$2#

will be only on dropbox for a few days

dependant dropdown- ETAF.xlsx

Shared with Dropbox

www.dropbox.com

A SMALL sample spreadsheet, around 10-20 rows, would help a lot here, with all sensitive data removed, and expected results mocked up and manually entered, with a few notes of explanation.

This will possibly enable a quicker and more accurate solution for you.

MrExcel has a tool called “XL2BB” that lets you post samples of your data and will allow us to copy/paste your sample data into our Excel spreadsheets, saving a lot of time.

XL2BB - Excel Range to BBCode

Excel 'mini-sheet' in messages - XL2BB Although experts prefer to read your description and question instead of working in your actual file to solve your problem, there are times that it is difficult to explain an issue without providing actual...

www.mrexcel.com

You can also test to see if it works ok, in the "Test Here" forum.

Test Here

Use this forum to test your signature, learn bbcode, smilies, XL2BB, etc. Threads in this forum are automatically deleted after no replies for seven (7) days

www.mrexcel.com

OR if you cannot get XL2BB to work, or have restrictions on your PC

then put the sample spreadsheet onto a share

I only tend to goto OneDrive, Dropbox or google docs , as I'm never certain of other random share sites and possible virus.
Please make sure you have a representative data sample and also that the data has been desensitised, remember this site is open to anyone with internet access to see - so any sensitive / personal data should be removed

Make sure you set any share or google to share to everyone