SQL Server 2019

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create table companies
(
employeeid varchar(100),
divisionid varchar(100)
);
insert into companies values ('abc','div1');
insert into companies values ('def','div1');
insert into companies values ('abc','div1');
insert into companies values ('abc','div2');
insert into companies values ('xyz','div2');
5 rows affected

SELECT a.EmployeeID, a.DivisionId FROM companies a
  JOIN ( SELECT EmployeeID, DivisionId 
         FROM companies 
         GROUP BY EmployeeID, DivisionId 
         HAVING count(*) > 1 ) b
    ON a.EmployeeID = b.EmployeeID
   AND a.DivisionId = b.DivisionId;


EmployeeID
DivisionId


abc
div1

abc
div1


SELECT a.EmployeeID, a.DivisionId FROM companies a
  JOIN ( SELECT EmployeeID, DivisionId 
         FROM companies 
         GROUP BY EmployeeID, DivisionId 
         HAVING count(*) <= 1 ) b
    ON a.EmployeeID = b.EmployeeID
   AND a.DivisionId = b.DivisionId;


EmployeeID
DivisionId


abc
div2

def
div1

xyz
div2