After you fix the errors in the phone number, the Call button is enabled. The Call button is disabled if you type an invalid character in the phone number, or use the wrong format for the phone number.

The interpreted number, without the extra characters, displays under Number to call. These characters, although not required, are acceptable to use because they help you type the phone number in a familiar format. Lync Web App ignores the spaces, (, ) and - characters you type when it interprets the phone number. If you’ve entered the phone number in the correct format but you’re still seeing a disabled Call button, check if you have other issues.ĭid you enter any invalid characters together with the numbers? You can only use -, (, ), and spaces.ĭid you type the plus sign (+) in the middle of the number? You can only include the plus sign at the beginning of the phone number, as shown in the formats above. Here are some examples of phone number formats: To call from Lync Web App, you cannot replace the plus sign (+) with the international access code. If you forget to type it, Lync Web App adds it for you. The plus sign (+) at the beginning of the phone number is required.

Where's my phone number