Subject to any adjustment based on failure to meet fully the FY 2012 Threshold Performance Measures, the number of your units that vest will be determined on the basis of Subscription Software Revenue (as defined below) and Network Revenue (as defined below) for fiscal year 2011, as calculated pursuant to the following two tables. 75% of the number of units granted (as shown in the Notice of Stock Unit Award) shall be adjusted based on Table 1 below and 25% of the number of units granted (as shown in the Notice of Stock Unit Award) shall be adjusted based on Table 2 below:

Table 1

No Voting Rights

or Dividends

Units

Nontransferable

The Plan and Prior

Agreements

The text of the Plan is incorporated in this Agreement by reference.

The Plan, this Agreement and the Notice of Stock Unit Award constitute the entire understanding between you and the Company regarding this award. Any prior agreements, commitments or negotiations concerning this grant are superseded. However, if you and the Company entered into a Severance Agreement, then that Severance Agreement is not superseded and will continue to apply as described below.

Interpretation of

Severance Agreement

•        If a Change in Control (as defined in the Severance Agreement) occurs and you become entitled to accelerated vesting under the Severance Agreement after the Change in Control but before October 1, 2011, then 200% of the total number of your granted units will vest immediately. The FY 2011 Performance-Based Vesting Conditions and the FY 2012 Threshold Performance Measures will be disregarded.

•        If no Change in Control occurs but you become entitled to accelerated vesting (or continued vesting during a defined Continuation Period) under the Severance Agreement before October 1, 2011, then, for the purpose of calculating the number of shares eligible for vesting acceleration or vesting continuation under the Severance Agreement, the FY 2011 Performance-Based Vesting Conditions will be deemed to have been met at the 100% award vesting levels defined in Table 1: Subscription Software Revenue and in Table 2: Network Revenue above. The FY 2012 Threshold Performance Measures will be disregarded.

•        If you become entitled to accelerated vesting (or continued vesting during a defined Continuation Period) for any reason under the Severance Agreement after September 30, 2011, but before October 1, 2012, then, for the purpose of calculating the number of shares eligible for vesting acceleration or vesting continuation under the Severance Agreement, the actual percentage of the units calculated pursuant to Table 1: Subscription Software Revenue and in Table 2: Network Revenue above will be used. The FY 2012 Threshold Performance Measures will be disregarded.

•        If you become entitled to accelerated vesting (or continued vesting during a defined Continuation Period) for any reason under the Severance Agreement after September 30, 2012, for the purpose of calculating the number of shares eligible for vesting acceleration or vesting continuation under the Severance Agreement, the actual percentage of the units calculated pursuant to Table 1: Subscription Software Revenue and in Table 2: Network Revenue above will be used, subject to any adjustment pursuant to the second table based on failure to meet fully the FY 2012 Threshold Performance Measures.

FY 2012 Threshold

Performance Measures

“FY 2012 Threshold Performance Measure” means, for calculations made under Table 3 above, the amount of Subscription Software Revenue that is 102% of the actual FY 2011 Subscription Software Revenue achieved.

“FY 2012 Threshold Performance Measure” means, for calculations made under Table 4 above, the amount of Network Revenue that is 102% of the actual FY 2011 Network Revenue achieved.

Permissible

Trading Day

•        The Nasdaq Global Market is open for trading on that day,

•        You are permitted to sell shares of the Company’s Common Stock on that day without incurring liability under Section 16(b) of the Securities Exchange Act of 1934, as amended,

•        Either (a) you are not in possession of material non-public information that would make it illegal for you to sell shares of the Company’s Common Stock on that day under Rule 10b-5 of the Securities and Exchange Commission or (b) you have implemented a trading plan under Rule 10b5-1 of the Securities and Exchange Commission covering the shares of the Company’s Common Stock to be issued under this Agreement and your trading plan has been approved by the Company’s Compliance Officer,

•        Under the Company’s written Securities Trading Policy, you are permitted to sell shares of the Company’s Common Stock on that day, and

•        You are not prohibited from selling shares of the Company’s Common Stock on that day by a written agreement between you and the Company or a third party.

Subscription

Software Revenue

“Subscription Software Revenue” means subscription software revenue as determined under U.S. GAAP and published in the Company’s periodic financial reports.