User Cannot Enter Exchange Rate Because Exchange Rate Field is Greyed Out

You cannot submit an Expense Report because you got the error message Enter an exchange rate. Once you open the Expense details, Exchange
Rate field is greyed out.

You have tried to enter the rate via link Use Rate from Configuration but error message received No exchange rate available.  Please enter a rate or contact your system administrator.

Reproducing the Issue

1. Go to the Travel & Expenses Work Center.
2. Create new Expense Report.
3. Add the Expenses details.
4. You got the error message Enter an exchange rate but Exchange Rate field is greyed out.
5. You have pressed the link Use Rate from Configuration but error message received No exchange rate available. Please enter a rate or contact
   your system administrator.

Cause

Issue is caused because exchange rate is missing in your system. You can check from the same via steps below.

1. Go to Travel Admin Work Center
2. Under Common Task press the link Update Exchange Rates.
3. Search for relevant currency example USD to GBP.
4. You will find that rates are not available.

Resolution

Please maintain the exchange rate between relevant currencies to avoid error message.