Some options:

Resolve, settle, decide, determine

Regarding resolve, the OED suggest as meaning:

1. Settle or find a solution to (a problem or contentious matter)

2. Decide firmly on a course of action.

Regarding settle, the OED suggests as meaning:

1. Resolve or reach an agreement about (an argument or problem)

So both point to each other.

Some options:

Resolve, settle, decide, determine

Regarding resolve, the OED suggest as meaning:

1. Settle or find a solution to (a problem or contentious matter)

2. Decide firmly on a course of action.

Regarding settle, the OED suggests as meaning:

1. Resolve or reach an agreement about (an argument or problem)

So both point to each other.

Some options:

Resolve, decide, determine, settle

Regarding resolve, the OED suggest as meaning:

1. Settle or find a solution to (a problem or contentious matter)

2. Decide firmly on a course of action.

I think resolve might the most formal one for a business context.

Some options:

Resolve, settle, decide, determine

Regarding resolve, the OED suggest as meaning:

1. Settle or find a solution to (a problem or contentious matter)

2. Decide firmly on a course of action.

Regarding settle, the OED suggests as meaning:

1. Resolve or reach an agreement about (an argument or problem)

So both point to each other.